3 2x5 4 5x9 5 9x14 6 14x20 7 20x27 July 8, 2019 16 32 64 128 5 + 9 = 14 2 ⋅ ( x − 9 5 ) − 3 ⋅ ( x + 1 8 ) = − 4 4 −9 ∙ 2 5 + 9 ∙ (−4 5)