90=10(x-12)

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Solution for 90=10(x-12) equation: 



90=10(x-12)

We move all terms to the left:

90-(10(x-12))=0



We calculate terms in parentheses: -(10(x-12)), so:

10(x-12)

We multiply parentheses

10x-120

Back to the equation:

-(10x-120)



We get rid of parentheses

-10x+120+90=0

We add all the numbers together, and all the variables

-10x+210=0

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

-10x=-210

x=-210/-10

x=+21

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