afqk
-------------------------
1-19.75+Z=2.25
Z=19.75-1+2.25
z=21
20.96-y=11.96
-y=11.96-20.96
-y=-9
y=9
afqk
-------------------------
1-19.75+Z=2.25
Z=19.75-1+2.25
z=21
20.96-y=11.96
-y=11.96-20.96
-y=-9
y=9