Question

ab+ba=154 va a-b=2
 

Answer 1

ab + ba = 154

=> 10a + b + 10b + a =154

=> 11a + 11b = 154

=> 11. ( a+b )= 154

=> a + b = 154 : 11 = 14

Mà a - b = 2

=> a = (14 + 2) : 2 = 8

=> b = 14 - 8 = 6

Answer 2

ab=86

Answer 3

ab + ba = 154

10a + b  +10b + a = 154

11a + 11b = 154

11(a + b) = 154

a +b = 154 : 11= 14

a = (14 + 2) : 2 = 8

b = 8 - 2 = 6

Vậy a=  8 ; b  = 6