x+(2/3x+15)=180

Solution for x+(2/3x+15)=180 equation:

x+(2/3x+15)=180

We move all terms to the left:

x+(2/3x+15)-(180)=0


Domain of the equation: 3x+15)!=0

x∈R


We get rid of parentheses

x+2/3x+15-180=0

We multiply all the terms by the denominator


x*3x+15*3x-180*3x+2=0

Wy multiply elements

3x^2+45x-540x+2=0

We add all the numbers together, and all the variables

3x^2-495x+2=0

a = 3; b = -495; c = +2;
Δ = b2-4ac
Δ = -4952-4·3·2
Δ = 245001
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-495)-\sqrt{245001}}{2*3}=\frac{495-\sqrt{245001}}{6}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-495)+\sqrt{245001}}{2*3}=\frac{495+\sqrt{245001}}{6}
$