Q=400-2x+15

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Solution for Q=400-2x+15 equation: 



=400-2Q+15

We move all terms to the left:

-(400-2Q+15)=0

We add all the numbers together, and all the variables

-(-2Q+415)=0

We get rid of parentheses

2Q-415=0

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

2Q=415

Q=415/2

Q=207+1/2

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