SOLUTION: 1) Charles spent $3.70 for 22 stamps. If he only bought $0.15 stamps and $0.20 stamps, how many of each kind did he buy? 2) A group of people went to a movie together. They spen

Question 447750: 1) Charles spent $3.70 for 22 stamps. If he only bought $0.15 stamps and $0.20 stamps, how many of each kind did he buy?
2) A group of people went to a movie together. They spent $24.75 for 8 tickets. If adult tickets cost $4.50 and children's tickets cost $2.25, how many of each kind of ticket were bought?
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
x+y=22
.15x+.20y=3.70
15x+20y=370
15x+15y=330
5y=40
y=8
x=14
Charles bought 14 of the $.15 stamps and 8 of the $.20 stamps..
----------------------------
x+y=8
4.50x+2.25y=24.75
2.25x+2.25y=18
2.25x=6.75
x=3
y=5
They bought 3 adult tickets and 5 childrens' tickets..
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