4MA0 Higher June 2012 Paper 4 Q7
7 Showing clear algebraic working, solve the simultaneous equations \[\begin{aligned} 3a + 2b &= 1 \\ a + 2b &= 5 \end{aligned}\]
(3)
| Scheme | Marks |
|---|---|
| \(2a = -4\) or \(4b = 14\) | M1 |
| \(a = -2\) \(b = 3.5\) | A1 A1 |
| (Total 3 marks) |
Notes
M1: Correctly eliminate 1 variable:
Accept \(3(5 - 2b) + 2b = 1\) oe
A1 A1: Ans dep on M1 Ans only or T&E = M0A0A0