4(p + 8) = -4p ... assuming you need to solve for p, the first step is to distribute the 4 to the inside of your parentheses
4p + 32 = -4p ... subtract 4p
32 = -8p ... divide by -8
p = -4 is your answer.
W+D=659
W=D-91
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(D-91)+D=659
D-91+D=659
2D=750
D=750/2=375
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W+375=659
W=284
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So the dryer had cost $375 and the washer had cost $284.
3.24 + 5.70 + 6.17 = 15.11
20.00 - 15.11 = 5.11
He got 5.11$ of change back.
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