take the 15 and 58 and add those to get 73 then add that to 38 and use this to determine Z by subtracting the resulting number of 73 and 38 which is 111 and then subtract that of 180 degrees and you'll get 69 and that is Z . Now that we have Z. We can find X. First we add 15 to Z which is 69 and we get 74 then we again subtract that of 180 degrees to get 106 and that is X. So all in all X = 106 degrees
