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12/4=x/20
We move all terms to the left:
12/4-(x/20)=0
We add all the numbers together, and all the variables
-(+x/20)+12/4=0
We add all the numbers together, and all the variables
-(+x/20)+3=0
We get rid of parentheses
-x/20+3=0
We multiply all the terms by the denominator
-x+3*20=0
We add all the numbers together, and all the variables
-1x+60=0
We move all terms containing x to the left, all other terms to the right
-x=-60
x=-60/-1
x=+60
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