X+15=3/4x+23

Solution for X+15=3/4x+23 equation:

X+15=3/4X+23

We move all terms to the left:

X+15-(3/4X+23)=0


Domain of the equation: 4X+23)!=0

X∈R


We get rid of parentheses

X-3/4X-23+15=0

We multiply all the terms by the denominator


X*4X-23*4X+15*4X-3=0

Wy multiply elements

4X^2-92X+60X-3=0

We add all the numbers together, and all the variables

4X^2-32X-3=0

a = 4; b = -32; c = -3;
Δ = b2-4ac
Δ = -322-4·4·(-3)
Δ = 1072
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:

$\sqrt{\Delta}=\sqrt{1072}=\sqrt{16*67}=\sqrt{16}*\sqrt{67}=4\sqrt{67}$
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-32)-4\sqrt{67}}{2*4}=\frac{32-4\sqrt{67}}{8}
$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-32)+4\sqrt{67}}{2*4}=\frac{32+4\sqrt{67}}{8}
$