Left align text in enumerate

Left align text in enumerate

I wish to left align justifications in mathematical/logical reasoning. I
am currently in an enumerate tag.
I have:
a) p or q by fact(10)
b) r by negation on (a, 10)
c) s by implication(b, 5)
..
..
I would like to turn the above into:
a) p or q by fact(10)
b) r by negation on (a, 10)
c) s by implication (b, 5)
..
..
I would know how to do this without the enumeration of the alphabet going
down the left side of the page. I could simply just use an align tag.
How do I get the above alignment in an enumeration?
Thanks in advance!