To buy a $150,000 house, you take out a 9% (APR) mortgage for $120,000. Five years later,

Question:

To buy a $150,000 house, you take out a 9% (APR) mortgage for $120,000. Five years later, you sell the house for $185,000 (after all other selling expenses). What equity (the amount that you can keep before tax) would you realize with a 30-year repayment term?