365. х/3 + х/12 = 15/4 I*12
12х/3 + 12х/12 = 12*15 / 4
4х+х = 45
5х = 45
х = 45:5
х = 9
366. х/4 + х/8 = 3/2 I*8
8х/4 + 8х/8 = 8*3 / 2
2х+х=12
3х = 12
х = 12:3
х = 4
367. х/5 - х/2 = -3 I*10
10х/5 - 10х/2 = 10*(-3)
2х-5х = -30
-3х = -30
х = -30:(-3)
х = 10