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.
in one variable​

Answer 1

If 18 is added to the number, the digits change their places. Hence, the number is 35.

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Answer 2

Answer:

Number:-10x+(8-x)

Let two digits of number be x and (8-x).

Now,

ATQ:-

10x+(8-x)+18=10(8-x)+x ......(Number reverse)

10x+8-x+18=80-10x+x

9x+26=80-9x

9x+9x=80-26

18x=54

x=54/18

x=3

______________________

THEREFORE NUMBER IS.....

10x+(8-x)

30+5

35. Answer