SOLUTION: Liam has some dimes and quarters.He has 7 more quarters than he has dimes. If liam has 15 coins in all, which is the vLue of his coins?

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Question 963538: Liam has some dimes and quarters.He has 7 more quarters than he has dimes. If liam has 15 coins in all, which is the vLue of his coins?
Found 2 solutions by hkwu, MathTherapy:
Answer by hkwu(60) About Me  (Show Source):
You can put this solution on YOUR website!
Let q, d denote your coins. Then
q=d%2B7
and
q%2Bd=15
or
%28d%2B7%29%2Bd=15
2d%2B7=15
2d=22
d=11
He has 11 dimes, so he would also have 18 quarters. The total value of his coins is $5.60.
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Answer by MathTherapy(10557) About Me  (Show Source):
You can put this solution on YOUR website!

Liam has some dimes and quarters.He has 7 more quarters than he has dimes. If liam has 15 coins in all, which is the vLue of his coins?
Number of dimes: highlight_green%284%29

Number of quarters: 4 + 7 or highlight_green%2811%29

Value: 4(.1) + 11(.25)______$0.40 + $2.75_______highlight_green%28%22%24%223.15%29