-3x+x=42

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Solution for -3x+x=42 equation: 



-3x+x=42

We move all terms to the left:

-3x+x-(42)=0

We add all the numbers together, and all the variables

-2x-42=0

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

-2x=42

x=42/-2

x=-21

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