Решите уравнение
6×15+4200: (6x-10)=300

х = 5

Пошаговое объяснение:

6 × 15 + 4200 : (6x - 10) = 300

90 + 4200 : (6x - 10) = 300

4200 : (6x - 10) = 300 - 90

4200 : (6x - 10) = 210

(6x - 10) = 4200 : 210

6x - 10 = 20

6х = 20 + 10

6х = 30

х = 30 : 6

х = 5

Проверка:

6 × 15 + 4200 : (6 × 5 - 10) = 300

90 + 4200 : (30 - 10) = 300

90 + 4200 : 20 = 300

90 + 210 = 300

300 = 300