Question 984236: Chris has 7 more dollars coins than 25 cent coins. Altogether he has 19.50. How many dollar coins has she? Answer by macston(5194) (Show Source):
You can put this solution on YOUR website! .
Q=number of quarters; D=dollars=Q+7
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$0.25Q+$1.00D=$19.50
$0.25Q+$1.00(Q+7)=$19.50
$0.25Q+$1.00Q+$7.00=$19.50
$1.25Q=$12.50
Q=10 She had 10 quarters
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D=Q+7=10+7=17
ANSWER: She had 17 dollar coins.
