-x+40=4(-x+7)

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Solution for -x+40=4(-x+7) equation: 



-x+40=4(-x+7)

We move all terms to the left:

-x+40-(4(-x+7))=0

We add all the numbers together, and all the variables

-x-(4(-1x+7))+40=0

We add all the numbers together, and all the variables

-1x-(4(-1x+7))+40=0



We calculate terms in parentheses: -(4(-1x+7)), so:

4(-1x+7)

We multiply parentheses

-4x+28

Back to the equation:

-(-4x+28)



We get rid of parentheses

-1x+4x-28+40=0

We add all the numbers together, and all the variables

3x+12=0

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

3x=-12

x=-12/3

x=-4

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