××11-(7×5-9×9:f:3):8=7
11-(45-81:f:3)=8×7
11-(45-81:f:3)=56
(45-81:f:3)=56+11
(45-81:f:3)=67
81:f:3=65-45
81:f:3=20
f:3=20×81
f:3=1620
f=1620:3
f=540
22-5×(38-4×g)=12
5×(38-4×g)=12+22
5×(38-4×g)=35
(38-4×g)=35:5
(38-4×g)=7
4×g=38+7
4×g=45
g=44:4
g=11
