Question

Решите уравнение (3 1/2 x-1/4)8=3

Answer 1

Ответ:

5/28.

Пошаговое объяснение:

(3 1/2 x - 1/4)•8 = 3

3 1/2 x - 1/4 = 3 : 8

3 1/2 x - 1/4 = 3/8

3 1/2х = 3/8 + 1/4

3 1/2х = 3/8 + 2/8

3 1/2х = 5/8

х = 5/8 : 3 1/2

х = 5/8 • 2/7

х = (5•2)/(8•7)

х = (5•1)/(4•7)

х = 5/28

Проверка:

(3 1/2•5/28 - 1/4)•8 = 3

(7/2•5/28 - 1/4)•8 = 3

(5/8 - 2/8) •8 = 3

3/8•8 = 3

3 = 3 - верно.