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20/x+3=13
We move all terms to the left:
20/x+3-(13)=0
Domain of the equation: x!=0We add all the numbers together, and all the variables
x∈R
20/x-10=0
We multiply all the terms by the denominator
-10*x+20=0
We add all the numbers together, and all the variables
-10x+20=0
We move all terms containing x to the left, all other terms to the right
-10x=-20
x=-20/-10
x=+2
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