-90=-6(1+2x)

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Solution for -90=-6(1+2x) equation: 



-90=-6(1+2x)

We move all terms to the left:

-90-(-6(1+2x))=0

We add all the numbers together, and all the variables

-(-6(2x+1))-90=0



We calculate terms in parentheses: -(-6(2x+1)), so:

-6(2x+1)

We multiply parentheses

-12x-6

Back to the equation:

-(-12x-6)



We get rid of parentheses

12x+6-90=0

We add all the numbers together, and all the variables

12x-84=0

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

12x=84

x=84/12

x=7

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