4400 Higher June 2007 Paper 4 Q6
6 Solve the simultaneous equations
\[y = x + 3\]\[y = 7x\](3)
| Scheme | Marks |
|---|---|
| \(x + 3 = 7x\) (\(6x = 3\) oe) or \(7y = 7x + 21\) (\(6y = 21\)) | M1 |
| \(x = \frac{1}{2}\), \(y = 3\frac{1}{2}\) | A1 A1 |
| (3) | |
| (3 marks) |
Notes
M1: \(y = 7(y - 3)\) \(y = 7y - 21\) \(0 = 6x - 3\)