Solve for 0<x<360, the equation tan(2x - 45) = 1

(N.B. the question is in degrees & the interval is greater than or EQUAL to 0 and less than OR EQUAL to 360)

The solution is:

x = 45, 135, 225, 315

I am just not sure how to get to the answer-help would really be appreciated- BIG exam in less than a day. Thanks x