Question 932282: i have $11 which are x dimes and x-12 quarters how many of each coin do i have.
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! x = dimes
y = x-12 = quarters
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10x + 25y = 1100
10x + 25(x-12) = 1100
10x + 25x - 12*25 = 1100
35x = 1100 + 12*25
x = (1100 + 12*25)/35
x = 40
y = x-12
y = 40-12
y = 28
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answer:
x = dimes = 40
y = quarters = 28
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