P=100-5x.P=400-3.5x

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Solution for P=100-5x.P=400-3.5x equation: 



=100-5P.=400-3.5P

We move all terms to the left:

-(100-5P.)=0

We add all the numbers together, and all the variables

-(-5P.+100)=0

We get rid of parentheses

5P.-100=0

We move all terms containing P to the left, all other terms to the right

5P.=100

P=100/1

P=100

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