4400 Higher November 2008 Paper 4 Q15
15 Solve the simultaneous equations\[\begin{aligned} 5x + 4y &= 3 \\ x - 2y &= 2 \end{aligned}\]You must show sufficient working.
(3)
| Scheme | Marks |
|---|---|
| \(2x - 4y = 4\) or \(x = 2y + 2\) or similar | M1 |
| \(x = 1\) | A1 |
| \(y = -\frac{1}{2}\) oe | A1 |
| (3) | |
| (3 marks) |
Notes
M1: correctly equate coeffs of \(x\) or \(y\) or make \(x\) or \(y\) the subject