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Svetradugi [14.3K]
3 years ago
10

The value of a two-digit number exceeds twice the sum of its digits by 19. The tens digit is two less than the units digit. Find

the number.
Mathematics
1 answer:
kondaur [170]3 years ago
8 0

Answer with Step-by-step explanation:

Let the ones digit of the number be y

and tens digit of the number be x.

The tens digit is two less than the units digit.

i.e. x=y-2

The value of the number exceeds twice the sum of its digits by 19.

i.e. 10x+y=2(x+y)+19

10(y-2)+y=2(y-2+y)+19

10y-20+y=2(2y-2)+19

11y-20=4y-4+19

11y-4y=20-4+19

7y=35

dividing both sides by 7, we get

y=5

Putting value of y in x=y-2, we get

x=3

10x+y=10×3+5

         =35

Hence, the two digit number is:

35

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