3(x-7)-x=-2x-21

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Solution for 3(x-7)-x=-2x-21 equation: 



3(x-7)-x=-2x-21

We move all terms to the left:

3(x-7)-x-(-2x-21)=0

We add all the numbers together, and all the variables

-1x+3(x-7)-(-2x-21)=0

We multiply parentheses

-1x+3x-(-2x-21)-21=0

We get rid of parentheses

-1x+3x+2x+21-21=0

We add all the numbers together, and all the variables

4x=0

x=0/4

x=0

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