7x 2 5x 1 0 July 8, 2019 16 32 64 128 2x 3 7x 2 5x 1 0 7x 3 6 5x 1 2 0 2x 4 7x 3 3x 2 5x 1 0 В равенстве 2 1 5x 0 5 7x 5x 4 7x 3 5x 2 5x 1 0 2 7x 0 8 1 5x 1 6 Cho phương trình 5x 2 7x 1 0 0 2x 2 5x 1 7x 11 10 2x 7 7-5x = -2x+1
