(99-x)=(3x+7)

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Solution for (99-x)=(3x+7) equation: 



(99-x)=(3x+7)

We move all terms to the left:

(99-x)-((3x+7))=0

We add all the numbers together, and all the variables

(-1x+99)-((3x+7))=0

We get rid of parentheses

-1x-((3x+7))+99=0



We calculate terms in parentheses: -((3x+7)), so:

(3x+7)

We get rid of parentheses

3x+7

Back to the equation:

-(3x+7)



We get rid of parentheses

-1x-3x-7+99=0

We add all the numbers together, and all the variables

-4x+92=0

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

-4x=-92

x=-92/-4

x=+23

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