-3(7+x)=42

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Solution for -3(7+x)=42 equation: 



-3(7+x)=42

We move all terms to the left:

-3(7+x)-(42)=0

We add all the numbers together, and all the variables

-3(x+7)-42=0

We multiply parentheses

-3x-21-42=0

We add all the numbers together, and all the variables

-3x-63=0

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

-3x=63

x=63/-3

x=-21

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