90=2(3+7x)

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Solution for 90=2(3+7x) equation: 



90=2(3+7x)

We move all terms to the left:

90-(2(3+7x))=0

We add all the numbers together, and all the variables

-(2(7x+3))+90=0



We calculate terms in parentheses: -(2(7x+3)), so:

2(7x+3)

We multiply parentheses

14x+6

Back to the equation:

-(14x+6)



We get rid of parentheses

-14x-6+90=0

We add all the numbers together, and all the variables

-14x+84=0

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

-14x=-84

x=-84/-14

x=+6

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