Jambmaths question:
Find the range of value of x which satisfy the inequality $4x-7\le 3x\text{ and }3x-4\le 4x$
Option A:
$-4\le x\le 7$
Option B:
$-7\le x\le 4$
Option C:
$x\ge -7$
Option D:
$-7\le x\le 6$
Jamb Maths Solution:
$\begin{align} & 4x-7\le 3x \\ & 4x-3x\le 7 \\ & x\le 7 \\ & \text{Also} \\ & 3x-4\le 4x \\ & 3x-4x\le 4 \\ & -x\le 4 \\ & x\ge 4 \\ & -4\le x\le 7 \\\end{align}$
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