Question 223193
.40x+.03(92-x)=22
.40x+2.76-.03x=22
.37x=22-2.76
.37x=19.24
x=19.24/.37
x=52 40 cent stamps were bought.
92-52=40 3 cent stamps were bought.
Proof:
.40*52+.03*40=22
20.8+1.20=22
22=22