90=9(4+2x)

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Solution for 90=9(4+2x) equation: 



90=9(4+2x)

We move all terms to the left:

90-(9(4+2x))=0

We add all the numbers together, and all the variables

-(9(2x+4))+90=0



We calculate terms in parentheses: -(9(2x+4)), so:

9(2x+4)

We multiply parentheses

18x+36

Back to the equation:

-(18x+36)



We get rid of parentheses

-18x-36+90=0

We add all the numbers together, and all the variables

-18x+54=0

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

-18x=-54

x=-54/-18

x=+3

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