5/4 x - 2/3 x + 1/2 x + 1/6

Combine terms with 'x':
(5/4 - 2/3 + 1/2)x + 1/6
Find a common denominator (12):
(15/12 - 8/12 + 6/12)x + 1/6
(13/12)x + 1/6