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-1/5y-4/3=4/3y-1
We move all terms to the left:
-1/5y-4/3-(4/3y-1)=0
Domain of the equation: 5y!=0
y!=0/5
y!=0
y∈R
Domain of the equation: 3y-1)!=0We get rid of parentheses
y∈R
-1/5y-4/3y+1-4/3=0
We calculate fractions
(-27y)/135y^2+(-20y)/135y^2+(-20y)/135y^2+1=0
We multiply all the terms by the denominator
(-27y)+(-20y)+(-20y)+1*135y^2=0
Wy multiply elements
135y^2+(-27y)+(-20y)+(-20y)=0
We get rid of parentheses
135y^2-27y-20y-20y=0
We add all the numbers together, and all the variables
135y^2-67y=0
a = 135; b = -67; c = 0;
Δ = b2-4ac
Δ = -672-4·135·0
Δ = 4489
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{4489}=67$$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-67)-67}{2*135}=\frac{0}{270} =0 $$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-67)+67}{2*135}=\frac{134}{270} =67/135 $
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