very imp.

Asked by  | 12th Mar, 2009, 12:32: PM

Expert Answer:

let units digit of the no. = x

tens digit = y

So the number is 10y+x

according to the question,

10y+x = 7(x+y)

10y+x = 3xy-12

solving these two equations we get y = 8 and x = 4

Hence the no. is 84.

Answered by  | 12th Mar, 2009, 12:39: PM

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