-42=4x+42

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Solution for -42=4x+42 equation: 



-42=4x+42

We move all terms to the left:

-42-(4x+42)=0

We get rid of parentheses

-4x-42-42=0

We add all the numbers together, and all the variables

-4x-84=0

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

-4x=84

x=84/-4

x=-21

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