3-(3x+10)=21-7x

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Solution for 3-(3x+10)=21-7x equation: 



3-(3x+10)=21-7x

We move all terms to the left:

3-(3x+10)-(21-7x)=0

We add all the numbers together, and all the variables

-(3x+10)-(-7x+21)+3=0

We get rid of parentheses

-3x+7x-10-21+3=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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