Final answer:
If Hilda offers her car to settle the debt and Lex accepts, he can't claim she owes him anymore.
Step-by-step explanation:
In this scenario, Hilda owes Lex $3,000 and offers him her car as full settlement of the debt. If Lex accepts this offer, the agreement becomes binding. As a result, Lex cannot claim that Hilda still owes him anything on the original debt of $3,000. By accepting the car as full settlement, Lex is relinquishing his claim to any remaining amount.