1) 12х = 36 *5
12х = 180
х = 15
------------------------------
2) 27х = 54 *4
27х = 216
х = 8
----------------------------
3) 63х = 54 * 7
63х = 378
х = 6
--------------------------
4) 33х = 33* 2
33х = 66
х = 2
----------------------------
5) 20х = 15*8
20х = 120
х = 6
---------------------------
6) 48хх = 64 * 9
48х = 576
х = 12