-3x-15=42

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Solution for -3x-15=42 equation: 



-3x-15=42

We move all terms to the left:

-3x-15-(42)=0

We add all the numbers together, and all the variables

-3x-57=0

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

-3x=57

x=57/-3

x=-19

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