The sum of the digits of a two-digit number greater than 50 is 12. The difference between the digits is 4. Find the two-digit number
first hint:
possibilities that add to 12
57, 66, 75, 84, 93
of those, the difference is 4 is..
84
possibilities that add to 12
57, 66, 75, 84, 93
of those, the difference is 4 is..
84