4x=-3(7-x)

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Solution for 4x=-3(7-x) equation: 



4x=-3(7-x)

We move all terms to the left:

4x-(-3(7-x))=0

We add all the numbers together, and all the variables

4x-(-3(-1x+7))=0



We calculate terms in parentheses: -(-3(-1x+7)), so:

-3(-1x+7)

We multiply parentheses

3x-21

Back to the equation:

-(3x-21)



We get rid of parentheses

4x-3x+21=0

We add all the numbers together, and all the variables

x+21=0

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

x=-21

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