4400 Higher June 2009 Paper 4 Q9
9 Solve \(\dfrac{12 - x}{3} = 7\)
(3)
| Scheme | Marks |
|---|---|
| \(12 - x = 21\) or \(12 - 21 = x\) or \(-x = 21 - 12\) | M2 |
| \(-9\) | A1 |
| (3) | |
| (3 marks) |
Notes
M2: or \(\left[-\frac{x}{3} = 7 - \frac{12}{3}\right]\) or \(\left[\frac{12}{3} - 7 = \frac{x}{3}\right]\)
M1 for \(12 - x = 3 \times 7\)
A1: (Answer only gains no marks)