4MA0 Higher January 2013 Paper 3 Q5
5 Solve the simultaneous equations
\[\begin{aligned} y - 2x &= 6 \\ y + 2x &= 0 \end{aligned}\]Show clear algebraic working.
(3)
| Scheme | Marks |
|---|---|
| \(2y = 6\) or \(4x = -6\) | M1 |
| \(x = -1.5\) \(y = 3\) | A1 A1 |
| (3) |
Notes
M1: Adding or subtracting correctly or correct substitution leading to one correct equation and one unknown.
A1 A1: dep on M1 awarded otherwise M0A0