Question

Уравнение x+2x+3x=600

Answer 1

х + 2х + 3х = 60
6х = 600
х = 600 / 6
х = 100
 проверка
100 + 100*2 + 100 * 3 = 600
600 = 600

Answer 2

х+2х+3х=600
6х=600/ : 6
х=100