12=4(5+x)

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Solution for 12=4(5+x) equation: 



12=4(5+x)

We move all terms to the left:

12-(4(5+x))=0

We add all the numbers together, and all the variables

-(4(x+5))+12=0



We calculate terms in parentheses: -(4(x+5)), so:

4(x+5)

We multiply parentheses

4x+20

Back to the equation:

-(4x+20)



We get rid of parentheses

-4x-20+12=0

We add all the numbers together, and all the variables

-4x-8=0

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

-4x=8

x=8/-4

x=-2

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