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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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



We calculate terms in parentheses: -(3(x+7)), so:

3(x+7)

We multiply parentheses

3x+21

Back to the equation:

-(3x+21)



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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