158=-3(-6+7x)-7

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Solution for 158=-3(-6+7x)-7 equation: 



158=-3(-6+7x)-7

We move all terms to the left:

158-(-3(-6+7x)-7)=0

We add all the numbers together, and all the variables

-(-3(7x-6)-7)+158=0



We calculate terms in parentheses: -(-3(7x-6)-7), so:

-3(7x-6)-7

We multiply parentheses

-21x+18-7

We add all the numbers together, and all the variables

-21x+11

Back to the equation:

-(-21x+11)



We get rid of parentheses

21x-11+158=0

We add all the numbers together, and all the variables

21x+147=0

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

21x=-147

x=-147/21

x=-7

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