Question

sum of digits of 2 digit number less than 30 which seceded the product of its digits by 12​

Answer 1

Answer:

x+y=xy where x is not zero. It also follows immediately that y is not zero.

x=y(x-1).

Subtracting, x-1 from both sides,

x-(x-1)=y(x-1)-(x-1)

1=(y-1)(x-1)

Since, x and y are integral, the only values x-1 and y-1 can take are 1 and 1.

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