Mr. Brown bought a television set and paid $110 as the first installment. If he increases each payment by $20 and pays a total of 6 installments, how much will the television set have cost him?

Question

anonymous · Answer

It would be in the form of 110 + 20n, because with each installment the payment will increase an additional 20 dollars. There is a total of 6, so the sum of each installment needs to be added. So take the sum for each n up to 6
should be right!

texaschic101 · Answer

110 for first installment. (1st installment)
110 + 20 = 130 (2nd installment)
130 + 20 = 150 (3rd installment)
150 + 20 = 170 (4th installment)
170 + 20 = 190 (5th installment)
190 + 20 = 210 (6th installment)

I got 210. There is probably a better way to do this...I just don't know it.