Răspuns :
(100×d-110):39=10
100d-110/39 = 10
100d - 110 = 390
100d = 390 + 110
100d = 500
d = 5
100d-110/39 = 10
100d - 110 = 390
100d = 390 + 110
100d = 500
d = 5
(100×d-110):39=10
100×d-110=10×39
100×d-110=390
100×d=390+110
100×d=50p
d=500:100
d=5
100×d-110=10×39
100×d-110=390
100×d=390+110
100×d=50p
d=500:100
d=5