Question

Aflati x din proportia : 10 0 - x supra x - 75 = 16 supra 84 -x , x € Q.

Answer 1

$\frac{100-x}{x-75}$ = $\frac{16}{87-x}$⇒
(100-x)(84-x) = 16(x-75)⇒
8400 - 100x - 84x + x² = 16x - 1200⇒
x² - 184x = -9600