Tony Gambino is buying a $3000 sound system by making a down payment of $500 and 18 monthly payments of $151.39. Instead of making his 12th payment, Tony decides to pay off the loan a) How much interest will Tony save? (use the rule of 78s)

b) What is the total amount due to pay off the loan?

b

Step-by-step explanation:

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w