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

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

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

We move all terms to the left:

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


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

x∈R


We add all the numbers together, and all the variables

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

We get rid of parentheses

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

We multiply all the terms by the denominator


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

Wy multiply elements

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

We add all the numbers together, and all the variables

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

a = -2; b = 2; c = +1;
Δ = b2-4ac
Δ = 22-4·(-2)·1
Δ = 12
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:

$\sqrt{\Delta}=\sqrt{12}=\sqrt{4*3}=\sqrt{4}*\sqrt{3}=2\sqrt{3}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(2)-2\sqrt{3}}{2*-2}=\frac{-2-2\sqrt{3}}{-4}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(2)+2\sqrt{3}}{2*-2}=\frac{-2+2\sqrt{3}}{-4}
$