Răspuns :
a - b = 50
a : b = 3 rest 10 = > a = 3b + 10
3b + 10 - b = 50
2b + 10 = 50
2b = 50 - 10
2b = 40
b = 40 :2
b = 20
a = 3 x 20 + 10 = 70
70 - 20 = 50
70 : 20 = 3 rest 10
a : b = 3 rest 10 = > a = 3b + 10
3b + 10 - b = 50
2b + 10 = 50
2b = 50 - 10
2b = 40
b = 40 :2
b = 20
a = 3 x 20 + 10 = 70
70 - 20 = 50
70 : 20 = 3 rest 10