3(x-7)=-9x-21+12x

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Solution for 3(x-7)=-9x-21+12x equation: 



3(x-7)=-9x-21+12x

We move all terms to the left:

3(x-7)-(-9x-21+12x)=0

We add all the numbers together, and all the variables

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

We multiply parentheses

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

We get rid of parentheses

3x-3x+21-21=0

We add all the numbers together, and all the variables

=0

x=0/1

x=0

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