Question 108600
 a girl has 24 quarters and dimes. togther they had up to 3.60 how many quarters does she have?

q+d=24
.25q+.1d=3.60
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d=24-q
.25q+.1(24-q)=3.60
.25q+2.4-.1q=3.60
.15q=3.6-2.4
.15q=2.4
q=8
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8+d=24
d=24-8
d=16
:)