Word Problem x2

Question

If Blake has 2 times as many dimes as quarters and they have a combined value of 180 cents, how many of each coin does he have?

Answer 1

D = 2Q

10D+25Q = 180

2D + 5Q = 36

2(2Q) + 5Q = 36

9Q = 36

Q = 36/9 = 4 quarters

D =2(4) = 8 dimes

8(10) + 4(25) = 80+100 = 180