a question based on linear equation in one variable.

Asked by slesha | 22nd Dec, 2009, 10:34: PM

Expert Answer:

Let x, y be the ten's and unit's digit respectively and the number is 10x+y.

x = y + 2 ......(1)

10x + y - 18 = 10y + x

i.e. x - y = 2

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

Since (1) and (2) are same, there are many such numbers.

For example, y = 1

x = 3

The number is 31.

Similarly another number is 42 and so on.

Regards,

Team,

TopperLearning.

Answered by  | 22nd Dec, 2009, 10:50: PM

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