Jambmaths question:
Solve the inequality: $-7\le 9-8x<17-x$
Option A:
$-1\le x\le 2$
Option B:
$-1\le x<2$
Option C:
$-1<x<2$
Option D:
$-1<x\le 2$
Jamb Maths Solution:
$\begin{align} & -7\le 9-8x<17-x \\ & -7-9\le 9-8x-9<17-x-9\text{ }\left| \text{subtract 9 from both side} \right. \\ & -16\le -8x<8 \\ & \text{Divide both sides by }-8 \\ & 2\ge x>-1 \\ & -1<x\le 2 \\\end{align}$
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