-21-4x=-27-7x

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Solution for -21-4x=-27-7x equation: 



-21-4x=-27-7x

We move all terms to the left:

-21-4x-(-27-7x)=0

We add all the numbers together, and all the variables

-4x-(-7x-27)-21=0

We get rid of parentheses

-4x+7x+27-21=0

We add all the numbers together, and all the variables

3x+6=0

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

3x=-6

x=-6/3

x=-2

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