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125/5=100/x
We move all terms to the left:
125/5-(100/x)=0
Domain of the equation: x)!=0We add all the numbers together, and all the variables
x!=0/1
x!=0
x∈R
-(+100/x)+125/5=0
We add all the numbers together, and all the variables
-(+100/x)+25=0
We get rid of parentheses
-100/x+25=0
We multiply all the terms by the denominator
25*x-100=0
We add all the numbers together, and all the variables
25x-100=0
We move all terms containing x to the left, all other terms to the right
25x=100
x=100/25
x=4
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