Question

Sum of the digits of a 2 digit number is 12. If 18 is added to the original number the digits intetchanged their places . Write 2 linear equations representating these situations.....

Answer 1

let ten's digit be X
Nd one's place be Y
A.T.Q
X+Y=12....1
18+10x+Y=10y+X
9x-9y=-18
x-y=-2.......2