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10/y+20/y=5
We move all terms to the left:
10/y+20/y-(5)=0
Domain of the equation: y!=0We multiply all the terms by the denominator
y∈R
-5*y+10+20=0
We add all the numbers together, and all the variables
-5y+30=0
We move all terms containing y to the left, all other terms to the right
-5y=-30
y=-30/-5
y=+6
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