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

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

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

We move all terms to the left:

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


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

x∈R


We add all the numbers together, and all the variables

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

We get rid of parentheses

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

We multiply all the terms by the denominator


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

Wy multiply elements

-4x^2-8x+8x+1=0

We add all the numbers together, and all the variables

-4x^2+1=0

a = -4; b = 0; c = +1;
Δ = b2-4ac
Δ = 02-4·(-4)·1
Δ = 16
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{16}=4$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-4}{2*-4}=\frac{-4}{-8}
=1/2
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+4}{2*-4}=\frac{4}{-8}
=-1/2
$