13 4x 5 1 3 4x 4 2 July 8, 2019 16 32 64 128 3(1 - x) 5 - 4x 13-4x 1 13 4x-5 1=3 4x+4 2 13 4х - 5 1 = 3 4х + 4 2 1) 4 (13 – 3x) – 17 = –5x