-128=4(3+7x)

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Solution for -128=4(3+7x) equation: 



-128=4(3+7x)

We move all terms to the left:

-128-(4(3+7x))=0

We add all the numbers together, and all the variables

-(4(7x+3))-128=0



We calculate terms in parentheses: -(4(7x+3)), so:

4(7x+3)

We multiply parentheses

28x+12

Back to the equation:

-(28x+12)



We get rid of parentheses

-28x-12-128=0

We add all the numbers together, and all the variables

-28x-140=0

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

-28x=140

x=140/-28

x=-5

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