4x+20=7x-7

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Solution for 4x+20=7x-7 equation: 



4x+20=7x-7

We move all terms to the left:

4x+20-(7x-7)=0

We get rid of parentheses

4x-7x+7+20=0

We add all the numbers together, and all the variables

-3x+27=0

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

-3x=-27

x=-27/-3

x=+9

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