Question

A number consists of two digits whose sum is 8 if 18 is added to the number its digits are reversed find the number
(a) 20
(b)67
(c)5
(d)55​

Answer 1

Answer:

5

Step-by-step explanation:

x+y =8

x=8-y

10x+y+18=10y+x

9x-9y=-18

x-y=-2

8-2y=-18

2y=10

y=5