P=15x-7x+400

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Solution for P=15x-7x+400 equation: 



=15P-7P+400

We move all terms to the left:

-(15P-7P+400)=0

We add all the numbers together, and all the variables

-(8P+400)=0

We get rid of parentheses

-8P-400=0

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

-8P=400

P=400/-8

P=-50

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