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27+27:3:3-2b= 10+6:3


Răspuns :

27+27:3:3-2b= 10+6:3
27+9:3-2b= 10+2
27+3-2b= 12
30-2b= 12

30-12=2b

18=2b

b=18:2

b=9
27+27:3:3-2b=10+6:3
27+9:3-2b=10+2
27+3-2b=12
30-2b=12
-2b=30+12
-2b=42
b=42/(-2)
b=-12