4400 Higher June 2008 Paper 4 Q9
9 Solve the simultaneous equations\[\begin{aligned} 3x + y &= 4 \\ 5x - y &= 8 \end{aligned}\]You must show sufficient working.
(3)
| Scheme | Marks |
|---|---|
| \(8x = 12\) or \(8y = -4\) | M1 |
| \(x = 1.5\) oe | A1 |
| \(y = -0.5\) oe | A1 |
| (3) | |
| (3 marks) |
Notes
M1: Eliminate one variable correctly. Accept \(3x + 5x - 8 = 4\) or \(5(4 - y)/3 - y = 8\) oe
A1: No working M0 A0 A0