x = 200x/(6.253x - 158) + 20 subtract 20 from both sides
x - 20 = 200x/(6.253x - 158)
(x - 20)(6.253x - 158) = 200x
6.253x^2 - 158x - 125.06x + 3160 = 200x
6.253x^2 - 283.06x + 3160 - 200x = 0
6.253x^2 - 483.06x + 3160 = 0
qudratic equation time!
[-b +or- sqrt(b^2 - 4ac)] / 2a,
a = 6.253, b = - 483.06, c = 3160
[483.06 +or- sqrt((-483.06)^2 - 4 * 6.253 * 3160)]/2*6.253
[483.06 +or- sqrt(233346.9636 - 79037.92)]/ 12.506
[483.06 +or- sqrt(154309.0436)] /12.506