12=4(-1+x)

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Solution for 12=4(-1+x) equation: 



12=4(-1+x)

We move all terms to the left:

12-(4(-1+x))=0

We add all the numbers together, and all the variables

-(4(x-1))+12=0



We calculate terms in parentheses: -(4(x-1)), so:

4(x-1)

We multiply parentheses

4x-4

Back to the equation:

-(4x-4)



We get rid of parentheses

-4x+4+12=0

We add all the numbers together, and all the variables

-4x+16=0

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

-4x=-16

x=-16/-4

x=+4

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