x=100+1/2x

Solution for x=100+1/2x equation:

x=100+1/2x

We move all terms to the left:

x-(100+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

x-(1/2x+100)=0

We get rid of parentheses

x-1/2x-100=0

We multiply all the terms by the denominator


x*2x-100*2x-1=0

Wy multiply elements

2x^2-200x-1=0

a = 2; b = -200; c = -1;
Δ = b2-4ac
Δ = -2002-4·2·(-1)
Δ = 40008
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:

$\sqrt{\Delta}=\sqrt{40008}=\sqrt{4*10002}=\sqrt{4}*\sqrt{10002}=2\sqrt{10002}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-200)-2\sqrt{10002}}{2*2}=\frac{200-2\sqrt{10002}}{4}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-200)+2\sqrt{10002}}{2*2}=\frac{200+2\sqrt{10002}}{4}
$