-3(7x-7)+9=-21x+30

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Solution for -3(7x-7)+9=-21x+30 equation: 



-3(7x-7)+9=-21x+30

We move all terms to the left:

-3(7x-7)+9-(-21x+30)=0

We multiply parentheses

-21x-(-21x+30)+21+9=0

We get rid of parentheses

-21x+21x-30+21+9=0

We add all the numbers together, and all the variables

=0

x=0/1

x=0

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