3(x=7)=57

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Solution for 3(x=7)=57 equation: 



3(x=7)=57

We move all terms to the left:

3(x-(7))=0

We multiply parentheses

3x-21=0

We move all terms containing x to the left, all other terms to the right

3x=21

x=21/3

x=7

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