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

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Solution for 3(x+-7)+-1x=2x+-21 equation: 



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

3(x-7)-1x-(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

=0

x=0/1

x=0

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