Let x be measure of the first angle. Then the second angle measures 2x - 10, and the third angle measures 25 + (2x - 10), or 2x + 15. Since the sum of the measures of the interior angles of a triangle is 180 degrees, x + (2x - 10) + (2x + 15) = 180. The left hand side of the equation simplifies to 45 - 3x. Thus 5x + 5 = 180.