5y-5.25=13+3/4y

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Solution for 5y-5.25=13+3/4y equation:



5y-5.25=13+3/4y
We move all terms to the left:
5y-5.25-(13+3/4y)=0
Domain of the equation: 4y)!=0
y!=0/1
y!=0
y∈R
We add all the numbers together, and all the variables
5y-(3/4y+13)-5.25=0
We get rid of parentheses
5y-3/4y-13-5.25=0
We multiply all the terms by the denominator
5y*4y-13*4y-(5.25)*4y-3=0
We multiply parentheses
5y*4y-13*4y-21y-3=0
Wy multiply elements
20y^2-52y-21y-3=0
We add all the numbers together, and all the variables
20y^2-73y-3=0
a = 20; b = -73; c = -3;
Δ = b2-4ac
Δ = -732-4·20·(-3)
Δ = 5569
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-73)-\sqrt{5569}}{2*20}=\frac{73-\sqrt{5569}}{40} $
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-73)+\sqrt{5569}}{2*20}=\frac{73+\sqrt{5569}}{40} $

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