X+1/2x=75

Solution for X+1/2x=75 equation:

X+1/2X=75

We move all terms to the left:

X+1/2X-(75)=0


Domain of the equation: 2X!=0

X!=0/2

X!=0

X∈R


We multiply all the terms by the denominator


X*2X-75*2X+1=0

Wy multiply elements

2X^2-150X+1=0

a = 2; b = -150; c = +1;
Δ = b2-4ac
Δ = -1502-4·2·1
Δ = 22492
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:

$\sqrt{\Delta}=\sqrt{22492}=\sqrt{4*5623}=\sqrt{4}*\sqrt{5623}=2\sqrt{5623}$
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-150)-2\sqrt{5623}}{2*2}=\frac{150-2\sqrt{5623}}{4}
$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-150)+2\sqrt{5623}}{2*2}=\frac{150+2\sqrt{5623}}{4}
$