12=3(7x+7)+3(5-3x)

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Solution for 12=3(7x+7)+3(5-3x) equation: 



12=3(7x+7)+3(5-3x)

We move all terms to the left:

12-(3(7x+7)+3(5-3x))=0

We add all the numbers together, and all the variables

-(3(7x+7)+3(-3x+5))+12=0



We calculate terms in parentheses: -(3(7x+7)+3(-3x+5)), so:

3(7x+7)+3(-3x+5)

We multiply parentheses

21x-9x+21+15

We add all the numbers together, and all the variables

12x+36

Back to the equation:

-(12x+36)



We get rid of parentheses

-12x-36+12=0

We add all the numbers together, and all the variables

-12x-24=0

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

-12x=24

x=24/-12

x=-2

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