Marvin is buying a watch from his brother
for $140. His brother tells him that he
can pay $40 down and the rest in 10
equal installments.
Which equation will help Marvin to figure out
how much his payments will be?
Let x = one installment.
Click on the correct answer.
140 = 40 + 10x
140 + 40 = 10x
140 + 10x = 40
140 - 40 = 10x - 40
The watch is 140 in total. He can pay 40 dollars currently. 10x is the amount of payments there are. How much he can pay with each payment (10x) is unknown so that is why there is the variable.
