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The tens digit of a certain number is five more than the units digit. The sum of the digits is 9. Fi...
5 months ago
Q:
The tens digit of a certain number is five more than the units digit. The sum of the digits is 9. Find the number.
Accepted Solution
A:
the tens digit = n
the units digit = n-5
n + n-5 = 9
2n = 9+5
2n = 14
n = 7 ← the tens digit
the units digit = n-5 = 7 - 5 = 2
the number is 72