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7m-2m=5m
7m+6m+2m+4m+5m=24m
Tylko nie wiem czy to jest podręcznik do tej samej klasy!
a=7
b=6-2=4
P1=7*4
P1=28
P2=a*b
a=2
b=7-2=5
P2=2*5
P2=10
Pc=P2+P1
Pc=10+28
Pc=38