2016-II-07

16-06-2021 app.cch No Comments

Ans: A
Consider the first inequality,

$\begin{array}{rcl} - 5 x & > & 21 - 2 x \\ - 3 x & > & 21 \\ x & < - 7 \end{array}$

Consider the second inequality,

$\begin{array}{rcl} 6 x - 18 & < & 0 \\ 6 x & < & 18 \\ x & < & 3 \end{array}$

$∴ x < - 7 and x < 3$ .

Therefore the overall solution is $x < - 7$ .

2016, HKDSE-MATH, Paper 2 Inequality