Question 984236
.
Q=number of quarters; D=dollars=Q+7
.
$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
.
D=Q+7=10+7=17
ANSWER: She had 17 dollar coins.