SOLUTION: the concession stand sell pizza and drinks during football games. Jack bought 4 drinks and 6 slices of pizza and paid $6.70. Amy bought 4 slices of pizza and 3 drinks and paid $

Question 1018404: the concession stand sell pizza and drinks during football games. Jack bought 4 drinks and 6 slices of pizza and paid $6.70. Amy bought 4 slices of pizza and 3 drinks and paid $4.65. what price is each drink and each slice of pizza?
Answer by FrankM(1040) (Show Source): You can put this solution on YOUR website!
4D+6P=670
3D+4P=465
Multiply first equation by 3, the second by 4
12D+18P=2010
12D+16P=1860
Now subtract second from first.
2P=150
P=75
Substitute into first.
4D+6(75)=670
4D+450=670
4D=220
D=55
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