Question

a number of consists of two digits whose sum is 8. if 18is added to the number its digits are reversed. find the number

Answer 1

let the digut bd x and y
x + y = 8......(1)

orignal no. 10x+ y

a/q
orignal no. + 18 = reverse no.
10x+y + 18 = 10y+ x
9y-9x=18
y-x= 2....(2)

fron 1 and 2
y - (8-y)= 2
2y= 10
y = 5
x= 3

otignal no. 35

Answer 2

Answer:

35

Step-by-step explanation:

3+5=8(the sum of the digits is 8)

35+18=53(the numbers are being reversed)

so the number is 35.