3(7+x)=57

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



3(7+x)=57

We move all terms to the left:

3(7+x)-(57)=0

We add all the numbers together, and all the variables

3(x+7)-57=0

We multiply parentheses

3x+21-57=0

We add all the numbers together, and all the variables

3x-36=0

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

3x=36

x=36/3

x=12

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