Ответ:

Пошаговое объяснение:

(х+8/15)/(1/6-4/15) = -20

(х+8/15)/(5/30-8/30) = -20

(х+8/15)/(-3/30) = -20

(х+8/15)/(-1/10) = -20

х + 8/15 = -20 * (-1/10)

х + 8/15 = 20/10

х + 8/15 = 2

х = 2 - 8/15

х = 1. 15/15 - 8/15

х = 1. 7/15