91=7-2(-2+5x)

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Solution for 91=7-2(-2+5x) equation: 



91=7-2(-2+5x)

We move all terms to the left:

91-(7-2(-2+5x))=0

We add all the numbers together, and all the variables

-(7-2(5x-2))+91=0



We calculate terms in parentheses: -(7-2(5x-2)), so:

7-2(5x-2)

determiningTheFunctionDomain
-2(5x-2)+7

We multiply parentheses

-10x+4+7

We add all the numbers together, and all the variables

-10x+11

Back to the equation:

-(-10x+11)



We get rid of parentheses

10x-11+91=0

We add all the numbers together, and all the variables

10x+80=0

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

10x=-80

x=-80/10

x=-8

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