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3x/10=12/2
We move all terms to the left:
3x/10-(12/2)=0
We add all the numbers together, and all the variables
3x/10-6=0
We multiply all the terms by the denominator
3x-6*10=0
We add all the numbers together, and all the variables
3x-60=0
We move all terms containing x to the left, all other terms to the right
3x=60
x=60/3
x=20
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