Question 320222
X+Y=40 OR X=40-Y
.05X+.10Y=3.35
.05(40-Y)+.10Y=3.35
2-.05Y+10Y=3.35
.05Y=3.35-2
.05Y=1.35
Y=1.35/.05
Y=27 DIMES.
X=40-27
X=13 NICKELS.
PROOF:
.05*13+.10*27=3.35
.65+2.70=3.35
3.35=3.35