90=-3(2+4x)

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Solution for 90=-3(2+4x) equation: 



90=-3(2+4x)

We move all terms to the left:

90-(-3(2+4x))=0

We add all the numbers together, and all the variables

-(-3(4x+2))+90=0



We calculate terms in parentheses: -(-3(4x+2)), so:

-3(4x+2)

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+96=0

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

12x=-96

x=-96/12

x=-8

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