Stamps 2

Dennis spent 34.15 on stamps. The number of .56 is 10 less than four times of stamps bought for .41. How many of each stamp did he buy?

Correct answer:

a =  50
b =  15

Step-by-step explanation:

0.56a + 0.41b = 34.15
a = 4b-10

0.56•a + 0.41•b = 34.15
a = 4•b-10

0.56a+0.41b = 34.15
a-4b = -10

a = 50
b = 15

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