Решите уравнение 1. 4/15: x=2/5 2. 2/15y+3/4=5/6 3. 5/8m-7/12m+5/6m=1/4

4/15 : х = 2/5
Х= 4/15 : 2/5
Х= 4/15 * 5/2
Х= 2/3

2/15у + 3/4 = 5/6
2/15у = 5/6 - 3/4
2/15у = 10/12 - 9/12
2/15у = 1/12
У= 1/12 : 2/15
У = 1/12 * 15/2
У= 15/24

5/8m - 7/12m+ 5/6m = 1/4
15/24m - 14/24m + 20/24m = 1/4
21/24m = 1/4
m = 1/4: 21/24
m = 1/4 * 24/21
m = 6/21