Question

Mr. Dinkelspiel bought $32.56 worth of stamps. He bought 20 more 19-cent stamps than 50-cent stamps. He bought twice as many 32-cent stamps as 19- cent stamps. How many of each kind did he buy?

Answer 1

He bought x 50-cent stamps.
He bought x+20 19-cent stamps.
He bought 2(x+20) 32-cent stamps.

50*x + 19(x+20) + 32*2(x+20)=3256
x=12

x+20 = 12+20=32 19-cent stamps.

2(x+20)=2*32=64

So he bought 12 50-cent stamps, 32 19-cent stamps and 64 32-cent stamps.