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interest 1) A family purchased a house 10 years ago for $90,000. The family put a 20% down payment on the house, and signed a 30-year mortgage at 9% on the unpaid balance. The net market value of the house (amount after subtracting all fees involved with selling the house) is now $140,000, and the family wishes to sell the house. How much equity does the family have in the house now after making 120 monthly payments