Well, 4 ain't equal to 5, and any "proof" to the contrary is faulty.
4-5 equals = -1
If you mean (5*4)/5 then it equals 4
-1
4*5 = 20
20
4
-4 +5 -5 + 4
1 times 4 = 4. 4+1= 5
5 x 4 equals 4 x 5 is commutative property.
50
If you mean 2 plus 2 equals 5 it is possible. 2 plus 2 equals 22 (or it could also be 4 if you want it but must be 22 to make 5...it makes sense) V is the 22nd letter in the alphabet and the roman numeral for V is 5. BOOM! 2 PLUS 2 EQUALS 5!
And what is the question?