3x(-7)=42

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



3x(-7)=42

We move all terms to the left:

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

We multiply parentheses

-21x-42=0

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

-21x=42

x=42/-21

x=-2

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