I need help with the following problem:

Describe the solution set for the following linear congruence:

140x = 133 (mod 301) (That should be the congruence symbol, not equal symbol, just not sure how to put it in.)

I know how to find specific solutions, but only by making a table and the mod is too large to make a table. I know there are 7 solutions because the gcd of (140,301) is 7, but I'm not sure how to describe them.