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28/100=x/100
We move all terms to the left:
28/100-(x/100)=0
We add all the numbers together, and all the variables
-(+x/100)+28/100=0
We get rid of parentheses
-x/100+28/100=0
We multiply all the terms by the denominator
-x+28=0
We add all the numbers together, and all the variables
-1x+28=0
We move all terms containing x to the left, all other terms to the right
-x=-28
x=-28/-1
x=+28
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