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-4/5y=20
We move all terms to the left:
-4/5y-(20)=0
Domain of the equation: 5y!=0We multiply all the terms by the denominator
y!=0/5
y!=0
y∈R
-20*5y-4=0
Wy multiply elements
-100y-4=0
We move all terms containing y to the left, all other terms to the right
-100y=4
y=4/-100
y=-1/25
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