We know:
Angles on a straight line sum to 180 degrees, so we can calculate OLM and OML, OLM will be 180 - 134, and OML will be 180 - 84. These are both 46 and 96. We also know that three angles in a triangle sum to 180 degrees, therefore 46 + 96 + x = 180, or 142 + x = 180, so x = 38 degrees