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22.5/x+6+22.5/x-6=9
We move all terms to the left:
22.5/x+6+22.5/x-6-(9)=0
Domain of the equation: x!=0We add all the numbers together, and all the variables
x∈R
22.5/x+22.5/x-9=0
We multiply all the terms by the denominator
-9*x+22.5+22.5=0
We add all the numbers together, and all the variables
-9x+45=0
We move all terms containing x to the left, all other terms to the right
-9x=-45
x=-45/-9
x=+5
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