Question

30 The sum of the digits of a two digit number is 9. If 27 is added to that number, the
digits get interchanged. Taking x as unit's digit and y as ten's digit, form a linear
equation for this information ​

Answer 1

Answer:

Let one's digit = x

And, ten's digit = y

Therefore, number is 10 + x

According to the question,

x + y = 9 ....(1)

Also,

10 + + 27 = 10x + y

x + y = 3 ......(2)

Solving equation 1 & 2, we get,

x = 6 and y = 3.

Hence, the original number is 10y + x = 36.

Step-by-step explanation:

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