Найдите неизвестное число: 1) 1 1/2 + х = 3/4 - вопрос №111234223472319470074 от sashakoshelem 21.03.2021 17:48

Question

Математика: Найдите неизвестное число: 1) 1 1/2 + х = 3/4 2) 2 3/4 - х = 7/2 3) х + 1 1/8 = 2 1/2

sashakoshelem · Answer

1) 3/2 + х = 3/46/4 + х = 3/4х = 3/4 - 6/4х = -3/4 = -0,752) 11/4 - х = 7/211/4 - х = 14/4-х = 14/4 - 11/4-х = 3/4х = -3/4 = -0,753) х + 1 1/8 = 2 1/2х + 9/8 = 5/2х + 9/8 = 20/8х = 20/8 - 9/8х = 11/8 = 1 3/8 = 1,375...