The sum of digits of two difit no is 12. if 18 is added to it ,the digits are reversed , find the number
Answers
Answered by
2
Answer:
69
Step-by-step explanation:
Answered by
9
Answer:
The number is 57
Step-by-step explanation:
Let,
Tens place number = x
Units place number = y
➙x + y = 12----------------(1)
10x + y is the number
➙ 10x + y +18 = 10y + x
➙ 10x -x + y - 10y = -18
➙ 9x -9y = -18
➙ 9(x - y) = -18
➙ x - y = -18 / 2
➙ x - y = -2-----------------(2)
Adding equation (1) and (2)
➙ 2x = 12 - 2
➙ 2x = 10
➙ x = 10 / 2
➙ x = 5
Tens place = 5
Units place = y
➙ x + y = 12
➙ 5 + y = 12
➙ y = 12 - 5
➙ y = 7
Units place = 7
Therefore,
The number is 57
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