Решить уравнение : 12×(1,3/4х+5/8)=-6,1/2 - вопрос №12134586123412033 от Бегемотик397 10.06.2020 14:01

Question

Математика: Решить уравнение : 12×(1,3/4х+5/8)=-6,1/2

Бегемотик397 · Answer

12 * (1 3/4х + 5/8) = - 6 1/21 3/4х + 5/8 = - 6 1/2 : 127/4х + 5/8 = -13/2 * 1/127/4х + 5/8 = - 13/247/4х = - 13/24 - 5/87/4х = - 13/24 - 15/247/4х = - 28/24х = - 28/24 : 7/4х = - 28/24 * 4/7х = - 28*4/24*7х = - 4*4/24х = - 16/24х = - 2/3проверка:12 * (1 3/4 * (- 2/3) + 5/8) = - 6 1/212 * (- 7/4 * 2/3 + 5/8) = - 13/212 * (- 14/12 + 5/8) = - 13/212 * (- 84/72 + 45/72) = - 13/212 * (- 39/72) = - 13/2- 39*12/72 = - 13/2- 39/6 = - 13/2- 13/2 = - 13/2...