-1 ≤ x ≤ 2
-1 ≤ x < 2
-1 < x < 2
-1 < x ≤ 2
Correct answer is D
-7 ≤ 9 - 8x < 16 - x
-7 ≤ 9 - 8x and 9 - 8x < 16 - x
-7 - 9 ≤ -8x and -8x + x < 16 - 9
-16 ≤ -8x and -7x < 7
∴ x \leq 2 and -1 < x
-1 < x \leq 2.
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