Question

300-b,ori 8-109=47 cine stie va rog

Answer 1

300-b×8-109=47
300-8b=47+109
300-8b=156
8b=300-156
8b=144
b=144:8
b=18
V: 300-18×8-109=300-144-109=47

Answer 2

300-b×8-109 = 47
300-b×8 = 47+109
300-b×8 = 156
b×8 =300-156
b×8 = 144
b = 144:8
b = 18
Verificare:
300-8×18-109 = 300-144-109 = 156-109 = 47