Simplify 5 - 2x -3 +x a) 2-x b) 1 c) x-2 d) 2-2x

M∠abc=138° and m∠def=31° . which statement is true about ∠abc and ∠def ? a: the angles are neither complementary nor supplementary. b: the angles are complementary. c: the angles are supplementary.