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-3x/7=42
We move all terms to the left:
-3x/7-(42)=0
We multiply all the terms by the denominator
-3x-42*7=0
We add all the numbers together, and all the variables
-3x-294=0
We move all terms containing x to the left, all other terms to the right
-3x=294
x=294/-3
x=-98
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