X+5=1/2x-4

Solution for X+5=1/2x-4 equation:

X+5=1/2X-4

We move all terms to the left:

X+5-(1/2X-4)=0


Domain of the equation: 2X-4)!=0

X∈R


We get rid of parentheses

X-1/2X+4+5=0

We multiply all the terms by the denominator


X*2X+4*2X+5*2X-1=0

Wy multiply elements

2X^2+8X+10X-1=0

We add all the numbers together, and all the variables

2X^2+18X-1=0

a = 2; b = 18; c = -1;
Δ = b2-4ac
Δ = 182-4·2·(-1)
Δ = 332
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:

$\sqrt{\Delta}=\sqrt{332}=\sqrt{4*83}=\sqrt{4}*\sqrt{83}=2\sqrt{83}$
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(18)-2\sqrt{83}}{2*2}=\frac{-18-2\sqrt{83}}{4}
$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(18)+2\sqrt{83}}{2*2}=\frac{-18+2\sqrt{83}}{4}
$