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100/50=x/45
We move all terms to the left:
100/50-(x/45)=0
We add all the numbers together, and all the variables
-(+x/45)+100/50=0
We add all the numbers together, and all the variables
-(+x/45)+2=0
We get rid of parentheses
-x/45+2=0
We multiply all the terms by the denominator
-x+2*45=0
We add all the numbers together, and all the variables
-1x+90=0
We move all terms containing x to the left, all other terms to the right
-x=-90
x=-90/-1
x=+90
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