Answer:
83.
Step-by-step explanation:
Let the digits be x and y so the number is xy.
x + y = 11
The new number is 45 less than the original number so
10y + x = 10x + y - 45
-9x + 9y = -45
-x + y = -5
x + y = 11 Adding:
2y = 6
y = 3
and x = 11/3 = 8.
So the number is 83.
