Răspuns :
b:3-75=225
b:3 = 225+75
b:3 = 300
b = 300×3
b = 900
verificare:
900:3-75 = 300-75 =225
b:3 = 225+75
b:3 = 300
b = 300×3
b = 900
verificare:
900:3-75 = 300-75 =225