X 4 = 90 20 July 8, 2019 16 32 64 128 4 x 20 90 4 х 20 90 Реши пропорцию 4 x 20 90 4 90 x 200 4/x = 20/90 x = 90 x 4 = 90 x 0 4 90 + x 4 * 10 60