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7-x/3=8
We move all terms to the left:
7-x/3-(8)=0
We add all the numbers together, and all the variables
-x/3-1=0
We multiply all the terms by the denominator
-x-1*3=0
We add all the numbers together, and all the variables
-1x-3=0
We move all terms containing x to the left, all other terms to the right
-x=3
x=3/-1
x=-3
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