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The sum of the two digits of a two- digits number is 7.If the digits are reversed, the new number increased  3 equals 4 times the original number . Find the original number.
Asked by ashishkumar68544 | 03 Jan, 2019, 07:48: PM Expert Answer
let the number be 10x + y
x+y =7.......(1)
reverse number 10y + x
10 y + x + 3 = 4 (10x + y)

39x-6y=3......(2)

(1)×6 + (2) gives
x=1
and y = 6
so number is 16
Answered by Arun | 04 Jan, 2019, 10:12: AM
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