Question 973478
X=DIMES
X+7=QUARTERS
.10X+.25(X+7)==4.90
.10X+.25X+1.75=4.90
.35X=4.90-1.75
.35X=315
X=3.15/.35
X=9 DIMES.
9+7=16 QUARTERS.
PROOF:
.10*9+.25*16=34.90
.90+4.00=4.90
4.90=4.90