3/5 х = 3 3/5 , 5/9 х = 11 2/3 , 7/11 х = 14/33 - вопрос №52047123533559112371114332355721 от POMOGIf 03.02.2022 22:04

Question

Математика: 3/5 х = 3 3/5 , 5/9 х = 11 2/3 , 7/11 х = 14/33 , 2/3 х = 5 , 5/7 х = 2 1/2 , 5/12 х = 12

POMOGIf · Answer

3/5 х = 3 3/5 х=3 3/5:3/5х=18/5:3/5х=18/5*5/3х=6Проверка:3/5*6=3 3/518/5=3 3/53 3/5=3 3/57/11 х = 14/33 х=14/33:7/11х=14/33*11/7х=2/3Проверка:7/11*2/3=14/3314/33=14/332/3 х = 5 х=5:2/3х=5*3/2х=15/2х=7 1/2Проверка:2/3*7 1/2=52/3*15/2=55=55/7 х = 2 1/2 х=2 1/2:5/7х=5/2:5/7х=5/2*7/5х=7/2х=3 1/2Проверка:5/7*3 1/2=2 1/25/7*7/2=2 1/25/2=2 1/22 1/2=2 1/25/12 х = 12х=12:5/12х=12*12/5х=144/5х=28 4/5Проверка:5/12*28 4/5=125/12*144/5=1212=12...