-7 ≤\leq≤ 9 - 8x < 16 - x
-7 ≤\leq≤ 9 - 8x and 9 - 8x < 16 - x
-7 - 9 ≤\leq≤ -8x and -8x + x < 16 - 9
-16 ≤\leq≤ -8x and -7x < 7
∴\therefore∴ x ≤\leq≤ 2 and -1 < x
-1 < x ≤\leq≤ 2.
