Question 17

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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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