-x-3=42

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Solution for -x-3=42 equation: 



-x-3=42

We move all terms to the left:

-x-3-(42)=0

We add all the numbers together, and all the variables

-1x-45=0

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

-x=45

x=45/-1

x=-45

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