(3/7-0,25)*x=4,9 , (7/8-0,2)*x=8,1 , (4-2 3/7)*x=2 - вопрос №2910496370254978028142372514 от lira0804 20.04.2023 01:27

Question

Математика: (3/7-0,25)*x=4,9 , (7/8-0,2)*x=8,1 , (4-2 3/7)*x=2 5/14

lira0804 · Answer

3/7х-1/4х=49/1012/28х-7/28х=49/105/28х=49/10х=49/10*28/5х=126/5х=25 1/5х=25,27/х-1/5х=81/1035/40х-8/40х=81/1027/40х=81/10х=81/10*40/27х=36/3х=124/1х-17/7х=33/1428/7х-17/7х=33/1411/7х=33/14х=33/14*7/11х=3/2х=1 1/2х=1,5...