Question 162881
.01*3X+.15(X+8)+.20X=5.00
.03X+.15X+1.2+.20X=5.00
.38X=5.00-1.20
.38X=3.80
X=3.80/.38
X=10 .20 CENT STANPS WERE PERDHASED.
3*10=30 .01 CENT STAMPS WERE PURCHASED.
10+8=18 .15 CENT STAMPS WERE PURCHASED.
10+30+18=58 A TOTAL OF 58 STAMPS WERE PURCHASED.
PROOF:
.01*30+.15*18+.20*10=5.00
.30+2.70+2.00=5.00
5.00=5.00