-1/2x+3=2x-5

Solution for -1/2x+3=2x-5 equation:

-1/2x+3=2x-5

We move all terms to the left:

-1/2x+3-(2x-5)=0


Domain of the equation: 2x!=0

x!=0/2

x!=0

x∈R


We get rid of parentheses

-1/2x-2x+5+3=0

We multiply all the terms by the denominator


-2x*2x+5*2x+3*2x-1=0

Wy multiply elements

-4x^2+10x+6x-1=0

We add all the numbers together, and all the variables

-4x^2+16x-1=0

a = -4; b = 16; c = -1;
Δ = b2-4ac
Δ = 162-4·(-4)·(-1)
Δ = 240
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{240}=\sqrt{16*15}=\sqrt{16}*\sqrt{15}=4\sqrt{15}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(16)-4\sqrt{15}}{2*-4}=\frac{-16-4\sqrt{15}}{-8}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(16)+4\sqrt{15}}{2*-4}=\frac{-16+4\sqrt{15}}{-8}
$