x+x*(100/19)=168

Solution for x+x*(100/19)=168 equation:

x+x(100/19)=168

We move all terms to the left:

x+x(100/19)-(168)=0

We add all the numbers together, and all the variables

x+x(+100/19)-168=0

We multiply parentheses

100x^2+x-168=0

a = 100; b = 1; c = -168;
Δ = b2-4ac
Δ = 12-4·100·(-168)
Δ = 67201
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{-(1)-\sqrt{67201}}{2*100}=\frac{-1-\sqrt{67201}}{200}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+\sqrt{67201}}{2*100}=\frac{-1+\sqrt{67201}}{200}
$