Higher November 2023 Paper 1 Q13
13 Here is an identity in \(x\).
\(5(2x + d) \equiv cx + 30\)
Work out the values of \(c\) and \(d\). [3 marks]
| Answer | Mark | Comments |
|---|---|---|
| \(10x + 5d\) or \(10x = cx\) or \(5d = 30\) | M1 | |
| \(10x = cx\) and \(5d = 30\) or \(c = 10\) or \(d = 6\) | M1dep | |
| \(c = 10 \quad d = 6\) | A1 |