Question 957237
Q+D=8 OR Q=8-D
.25Q+.10D=1.70
.25(8-D)+.10D=1.70
2.00-.25D+.10D=1.70
-.15D=1.70-2.00
-.15D=-.30
D=-.30/-.15
D=2 DIMES.
Q+2=8
Q=6 QUARTERS.
PROOF:
.25*6+2*.10=1.70
1.50+.20=1.70
1.70=1.70