math
posted by Anonymous .
bob buys 3 slices of pizza and a brownie, Al buys 2 slices of pizza and 2 brownies....bobs total cost before tax is 8.26...Al's total before tax was 6.96, what is price of once slice of pizza and what is price of 1 brownie

3p + b = 826
2p + 2b = 696
divide the 2nd by 2
p + b = 348
subtract from the 1st
2p = 478
p = 239
sub into simplified 2nd
239 + b = 348
b = 109
pizza slice costs $2.39 and a brownie costs $1.09
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