4-(x-3)-3x=-21

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Solution for 4-(x-3)-3x=-21 equation: 



4-(x-3)-3x=-21

We move all terms to the left:

4-(x-3)-3x-(-21)=0

We add all the numbers together, and all the variables

-3x-(x-3)+25=0

We get rid of parentheses

-3x-x+3+25=0

We add all the numbers together, and all the variables

-4x+28=0

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

-4x=-28

x=-28/-4

x=+7

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