7x-3(4-3x)=-21+7x

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Solution for 7x-3(4-3x)=-21+7x equation: 



7x-3(4-3x)=-21+7x

We move all terms to the left:

7x-3(4-3x)-(-21+7x)=0

We add all the numbers together, and all the variables

7x-3(-3x+4)-(7x-21)=0

We multiply parentheses

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

We get rid of parentheses

7x+9x-7x+21-12=0

We add all the numbers together, and all the variables

9x+9=0

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

9x=-9

x=-9/9

x=-1

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