A-Level Maths OCR B (MEI) (H640)

Be able to solve simple inequalities containing a modulus sign.

Including the use of inequalities of the form $|x - a| ≤ b$ to express upper and lower bounds, $a \pm b$, for the value of $x$.

[Excludes: Inequalities involving more than one modulus sign or modulus of non-linear functions.]