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168/84=x/20
We move all terms to the left:
168/84-(x/20)=0
We add all the numbers together, and all the variables
-(+x/20)+168/84=0
We add all the numbers together, and all the variables
-(+x/20)+2=0
We get rid of parentheses
-x/20+2=0
We multiply all the terms by the denominator
-x+2*20=0
We add all the numbers together, and all the variables
-1x+40=0
We move all terms containing x to the left, all other terms to the right
-x=-40
x=-40/-1
x=+40
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