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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

3(x-7)+21=0

We multiply parentheses

3x-21+21=0

We add all the numbers together, and all the variables

3x=0

x=0/3

x=0

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