800 + ab = 17 x ab
800 = 17 x ab - ab
800 = 16 x ab
ab = 800:16
ab = 50
Vậy: 850 : 50 = 17
50 chắc chắn
1000000000000000000000000000000000000000000000%
` @ L I N H `
800 + ab = 17 x ab
800 = 17 x ab - ab
800 = 16 x ab
ab = 800:16
ab = 50
Vậy: 850 : 50 = 17