Răspuns :
20:2=10 (cate masinute au cristi si ionut)
20-18=2 (masinute are Ionut)
10-2=8 (masinute are Cristi)
20-10=10 (masinute are Marius)
20-18=2 (masinute are Ionut)
10-2=8 (masinute are Cristi)
20-10=10 (masinute are Marius)
M + C + I = 20
C + I = 20 : 2
C + I = 10
M + C = 18
18 + I = 20
I = 20 - 18
I = 2 masinute
C + 2 = 10
C = 10 - 2
C = 8 masinute
M = 20 - 8 - 2
M = 10 masinute
C + I = 20 : 2
C + I = 10
M + C = 18
18 + I = 20
I = 20 - 18
I = 2 masinute
C + 2 = 10
C = 10 - 2
C = 8 masinute
M = 20 - 8 - 2
M = 10 masinute