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-7x/3=-42
We move all terms to the left:
-7x/3-(-42)=0
We add all the numbers together, and all the variables
-7x/3+42=0
We multiply all the terms by the denominator
-7x+42*3=0
We add all the numbers together, and all the variables
-7x+126=0
We move all terms containing x to the left, all other terms to the right
-7x=-126
x=-126/-7
x=+18
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