21x-42=7x+7(2x-6)

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Solution for 21x-42=7x+7(2x-6) equation: 



21x-42=7x+7(2x-6)

We move all terms to the left:

21x-42-(7x+7(2x-6))=0



We calculate terms in parentheses: -(7x+7(2x-6)), so:

7x+7(2x-6)

We multiply parentheses

7x+14x-42

We add all the numbers together, and all the variables

21x-42

Back to the equation:

-(21x-42)



We get rid of parentheses

21x-21x+42-42=0

We add all the numbers together, and all the variables

=0

x=0/1

x=0

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