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x/3-1=-21
We move all terms to the left:
x/3-1-(-21)=0
We add all the numbers together, and all the variables
x/3+20=0
We multiply all the terms by the denominator
x+20*3=0
We add all the numbers together, and all the variables
x+60=0
We move all terms containing x to the left, all other terms to the right
x=-60
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