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72/18=x/15
We move all terms to the left:
72/18-(x/15)=0
We add all the numbers together, and all the variables
-(+x/15)+72/18=0
We add all the numbers together, and all the variables
-(+x/15)+4=0
We get rid of parentheses
-x/15+4=0
We multiply all the terms by the denominator
-x+4*15=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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