Obtuse angles have a measure of over 90 degrees while being under 180 degrees. In this case, the measure of the larger angle and the smaller angle add to being 3 times the smaller angle (x + 2x). For the smaller angle to be over 90 degrees (the smallest obtuse angle), 3x > 90, or x > 30 degrees and 2x > 60 degrees. For the upper bound (180 degrees), the inequality is 3x < 180, so x < 60 and 2x < 120. The range of values for the larger angle would be 60 < 2x < 120.