9Y=2Y
9Y-2Y=0
7Y=0
Y=0/7
Y=0
16Z-56=8Z
16Z-8Z=56
8Z=56
Z=56/8
Z=7
7200:u=8000
u=7200/8000
u=0,9
Q:(270:90)=6
Q/3=6
Q=6*3
Q=18
9Y=2Y
9Y-2Y=0
7Y=0
Y=0/7
Y=0
16Z-56=8Z
16Z-8Z=56
8Z=56
Z=56/8
Z=7
7200:u=8000
u=7200/8000
u=0,9
Q:(270:90)=6
Q/3=6
Q=6*3
Q=18