W.M. Franks, Jr. appeals the decision of the district court holding that he was not entitled to enforce his Ken against the debtor Charlotte Wynne because the Ken was a judicial Ken that is avoidable under 11 U.S.C. § 522(f)(1)(A). Because we hold that the district court erroneously disposed of Frank’s arguments, we reverse and remand.

Charlotte Wynne conveyed certain real property by warranty deed to W.M. Franks on December 12, 1998, and the deed was duly recorded. Shortly thereafter, Franks paid certain taxes that were due on the property. In April of 1999, Franks sued Wynne in Texas state court for title and possession of the property. Franks later amended his complaint and sought to foreclose on a tax Ken that allegedly arose from his payment of taxes on the property. Wynne and Franks subsequently approved and the court entered an Agreed Judgment awarding Franks $12,000 plus interest. The Agreed Judgment was expressly secured by a Ken on the property. Wynne failed to make the necessary payments on the judgment and later filed for bankruptcy under Chapter 7.

In the bankruptcy proceedings, Wynne claimed the property as her homestead. She invoked 11 U.S.C. § 522(f)(1)(A)1 and sought to avoid any Ken resulting from the Agreed Judgment on the ground that the *474lien was a judicial lien that impaired her homestead exemption. Section 522(f)(1)(A) provides that “[t]he debtor may avoid the fixing of a lien on an interest of the debtor in property to the extent that such lien impairs an exemption to which the debtor would have been entitled ... if such lien is ... a judicial lien.... ” Franks argued that his lien is not a judicial hen, but is instead either a statutory tax hen or a security interest created by agreement. He claims that since he holds either a statutory lien or a security interest, Wynne cannot avoid the hen under § 522(f)(1)(A) because that statute only allows debtors to avoid judicial hens on exempt property. The bankruptcy court held that regardless of the basis or vahdity of Frank’s alleged statutory tax hen, the hen merged into the Agreed Judgement and thereafter became a judicial hen subject to avoidance under § 522(f)(1)(A). The court did not consider Franks’s argument that the hen was a consensual security interest.

Franks appealed the bankruptcy court’s decision to the district court, and the district court affirmed on other grounds. It held that Franks’s alleged statutory tax hen did not merge into the Agreed Judgment, but nevertheless determined that Franks did not have a statutory tax hen because he failed to show that he was subrogated to the taxing authority’s hen rights. The court declined to address the merits of Franks’s argument that the hen was a consensual security interest, concluding that Franks abandoned this argument in the bankruptcy court. Franks appeals, arguing that (1) res judicata and collateral estoppel prevent the district court from concluding that he does not have a statutory tax hen, (2) he presented evidence showing that he was equitably subrogated to the taxing authority’s hen rights, and (3) he did not abandon his argument that the hen was a consensual security interest. When reviewing a bankruptcy court decision, the bankruptcy court’s findings of fact are reviewed under the clearly erroneous standard and conclusions of law are reviewed de novo.2

We first address Franks’s argument that the hen was a statutory tax hen rather than a judicial hen. Although the bankruptcy court did not decide whether Franks’s hen was a statutory tax hen, the district court concluded that Franks did not have a statutory tax hen because Franks was not subrogated, either statutorily or equitably, to the taxing authority’s hen rights. Franks first argues that res judicata or collateral estoppel precludes the district court from determining that Franks was not subrogated to the hen rights of the taxing authorities because the state court’s Agreed Judgment determined that Franks was entitled to subrogation. While agreed judgments are generally entitled to full res judicata effect,3 the Agreed Judgment in this case says nothing about a tax lien, and there is nothing to indicate that it resolves the merits of Franks’s underlying tax hen claim. Because the Agreed Judgment does not appear to resolve the merits of Franks’s tax hen claim, res judicata and collateral estoppel do not apply.4

*475Franks also argues that he is equitably subrogated to the tax lien under certain principles embodied in Texas case law. Under Texas law, “a limited right to equitable subrogation of [a tax lien] may arise in accordance with certain well-established rules of law,”5 but a mere “volunteer” is not entitled to equitable subrogation to the rights of a hen holder.6 A “volunteer” in this context is “one who, in no event resulting from the existing state of affairs, can become hable for the debt, and whose property is not charged with the payment thereof and cannot be sold therefor.”7

The district court found that because there was no evidence that he was anything other than a volunteer, Franks could not be subrogated to the taxing authority’s hen rights. However, Franks submitted documentary evidence showing that Wynne had conveyed the property to him by warranty deed and that the deed had been duly recorded. There was evidence that at the time Franks paid the taxes on the property he was the record owner. Although Franks was not personally hable for the taxes assessed on his property before he became the owner,8 he took possession of the property subject to the hen.9 The fact that Franks paid the taxes that encumbered his own property is evidence that he did not act as a mere volunteer. The district court’s contrary conclusion is erroneous.

We now address Franks’s argument that the Agreed Judgment constitutes a consensual security interest, rather than a judicial hen. The district court, relying on Fehlhaber v. Fehlhaber,10 determined that Franks abandoned this argument in bankruptcy court because he “wholly ignored” the argument in his trial brief and failed to seek a ruling on the issue from the bankruptcy court. We disagree.

Franks raised his argument in both his pleadings and at the hearing on the judicial lien issue. Franks came to the hearing prepared to argue but also submitted a trial brief on some of the issues, despite having no obhgation to do so. Franks was not required to include all of his arguments in this trial brief, and his failure to do so does not constitute abandonment. While Franks could have argued the consensual security interest issue more forcefully at trial, he raised the argument in his pleadings and at the hearing to such a degree that the bankruptcy court was adequately informed of the argument and could rule on it.11 Moreover, the district court erred to the extent it concluded that Franks’s failure to seek an explicit ruling on his consensual security interest argument constituted an abandonment of the argument. Franks was not required to seek any determination on his consensual security interest argument in order to preserve it for appeal. Since the bankruptcy court’s final judgment is couched in terms that appear to resolve all the issues, it implicitly denied Franks’s consensual secu*476rity interest argument despite not expressly addressing it.12 Franks’s failure to seek an explicit determination on the issue does not constitute an abandonment of the argument. The district court should have addressed its merits.

For the foregoing reasons, we REVERSE the district court’s order and REMAND this case to the district court for further proceedings consistent with this opinion.