You can put this solution on YOUR website! You didn't indicate whether the two angles were equal or not. For example, 5x-13 could be the vertex angle and 3x+3, 3x+3 be the other two angles. In any case, if 5x-13 and 3x+3 are the equal angles, set them equal and solve. If one of the angles is the vertex, double it, add the remaining angle. That sum must equal 180, so set them equal and solve.