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

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



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

We move all terms to the left:

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

We multiply parentheses

7x-(7x-21)-28+7=0

We get rid of parentheses

7x-7x+21-28+7=0

We add all the numbers together, and all the variables

=0

x=0/1

x=0

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