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

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



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

We move all terms to the left:

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



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

7(x-3)

We multiply parentheses

7x-21

Back to the equation:

-(7x-21)



We get rid of parentheses

7x-7x+21-21=0

We add all the numbers together, and all the variables

=0

x=0/1

x=0

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