5 2x 3 )= 7x 15 July 8, 2019 16 32 64 128 2x 5 1 3 7x 2 15 2x 5 1 7x 15 3 2 (- 7x 5 )+ 2x 3x 3 15x 7x 3 15 1 5 2x 9 5 7x 3 2x 2 15 5 x 7 = 35 −2(5 − 3x) = 7x + 3