(11z-14)*38=304
11z-14=304:38
11z-14=8
11z=8+14
11z=22
z=22/11
z=2
25*(328-8k)=5400
328-8k=5400:25
328-8k=216
8k=216+328
8k=544
k=544:8
k=68
(7z-41)*28=2576
7z-41=2576:28
7z-41=92
7z=92+41
7z=133
z=133:7
z=19
75:(69-4z)=15
69-4z=75:15
69-4z=5
4z=5+69
4z=74
z=74:4
z=18,5
(11z-14)*38=304
11z-14=304:38
11z-14=8
11z=8+14
11z=22
z=22/11
z=2
25*(328-8k)=5400
328-8k=5400:25
328-8k=216
8k=216+328
8k=544
k=544:8
k=68
(7z-41)*28=2576
7z-41=2576:28
7z-41=92
7z=92+41
7z=133
z=133:7
z=19
75:(69-4z)=15
69-4z=75:15
69-4z=5
4z=5+69
4z=74
z=74:4
z=18,5