1/2x-3(x)=-4

Solution for 1/2x-3(x)=-4 equation:

1/2x-3(x)=-4

We move all terms to the left:

1/2x-3(x)-(-4)=0


Domain of the equation: 2x!=0

x!=0/2

x!=0

x∈R


We add all the numbers together, and all the variables

-3x+1/2x+4=0

We multiply all the terms by the denominator


-3x*2x+4*2x+1=0

Wy multiply elements

-6x^2+8x+1=0

a = -6; b = 8; c = +1;
Δ = b2-4ac
Δ = 82-4·(-6)·1
Δ = 88
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:

$\sqrt{\Delta}=\sqrt{88}=\sqrt{4*22}=\sqrt{4}*\sqrt{22}=2\sqrt{22}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(8)-2\sqrt{22}}{2*-6}=\frac{-8-2\sqrt{22}}{-12}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(8)+2\sqrt{22}}{2*-6}=\frac{-8+2\sqrt{22}}{-12}
$