1/2y+y=130

Solution for 1/2y+y=130 equation:

1/2y+y=130

We move all terms to the left:

1/2y+y-(130)=0


Domain of the equation: 2y!=0

y!=0/2

y!=0

y∈R


We add all the numbers together, and all the variables

y+1/2y-130=0

We multiply all the terms by the denominator


y*2y-130*2y+1=0

Wy multiply elements

2y^2-260y+1=0

a = 2; b = -260; c = +1;
Δ = b2-4ac
Δ = -2602-4·2·1
Δ = 67592
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{67592}=\sqrt{4*16898}=\sqrt{4}*\sqrt{16898}=2\sqrt{16898}$
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-260)-2\sqrt{16898}}{2*2}=\frac{260-2\sqrt{16898}}{4}
$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-260)+2\sqrt{16898}}{2*2}=\frac{260+2\sqrt{16898}}{4}
$