SOLUTION: Anna has a pocket of dimes and quarters if she has 10 coins worth 1.45 how many of her coins are quarters

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Question 905194: Anna has a pocket of dimes and quarters if she has 10 coins worth 1.45 how many of her coins are quarters
Answer by harpazo(655) About Me  (Show Source):
You can put this solution on YOUR website!
Multiply 1.45 by 100 to remove the decimal value.
So, 1.45 x 10 = 145.

d + q = 10
10d + 25q = 145
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d = 10 - q
10(10- q) + 25q = 145
100 - 10q + 25q = 145
100 + 15q = 145
15q = 145 - 100
15q = 45
q = 45/15
q = 3
The number of quarters she has is 3.