SOLUTION: Please help! If you can show me what I did wrong, that would be helpful, thanks 1. Hans paid $1.50 each for programs to the game. He sold all but 20 of them for $3 each and mad

Question 351841: Please help! If you can show me what I did wrong, that would be helpful, thanks
1. Hans paid $1.50 each for programs to the game. He sold all but 20 of them for $3 each and made a profit of $15. How many programs did he buy?
(Hint:Profit= Selling Price - Purchase price)
Number x Price = Cost
|-------|----------|-------|----------| 150x+3(20-x)=15
|Bought | 12-x | 20 | 20(12-x) | 150x+60-3x=15
|-------|----------|-------|----------| - 3x -3x
|Sold | x | 40 | 40x | ---- ----
|-------|----------|-------|----------| 147x+60 = 15
-15 -15
---- ----
147x=45
--- ---
45x 45x

X=2.72
2. Ceila bought 12 apples, ate two of them, and sold the rest at 20� more per apple than she paid. Her total profit was #1.00. How much did she sell each apple for?

Number x Price = Cost
|-------|----------|-------|----------| 40x+20(12-x)=100
|Bought | 12-x | 20 | 20(12-x) | 40x+240-20x=100
|-------|----------|-------|----------| -20 -20
|Sold | x | 40 | 40x | ---- ----
|-------|----------|-------|----------| 20x+240 = 100
-100 -100
---- -----
20x=140
--- ---
20 20

X=70
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

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