-15-3x=5+1/2x

Solution for -15-3x=5+1/2x equation:

-15-3x=5+1/2x

We move all terms to the left:

-15-3x-(5+1/2x)=0


Domain of the equation: 2x)!=0

x!=0/1

x!=0

x∈R


We add all the numbers together, and all the variables

-3x-(1/2x+5)-15=0

We get rid of parentheses

-3x-1/2x-5-15=0

We multiply all the terms by the denominator


-3x*2x-5*2x-15*2x-1=0

Wy multiply elements

-6x^2-10x-30x-1=0

We add all the numbers together, and all the variables

-6x^2-40x-1=0

a = -6; b = -40; c = -1;
Δ = b2-4ac
Δ = -402-4·(-6)·(-1)
Δ = 1576
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:

$\sqrt{\Delta}=\sqrt{1576}=\sqrt{4*394}=\sqrt{4}*\sqrt{394}=2\sqrt{394}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-40)-2\sqrt{394}}{2*-6}=\frac{40-2\sqrt{394}}{-12}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-40)+2\sqrt{394}}{2*-6}=\frac{40+2\sqrt{394}}{-12}
$