4MA0 Foundation January 2015 Paper 2R Q20
20 Solve
\(x + 2y = 3\)
\(x - y = 6\)
\(x - y = 6\)
Show clear algebraic working.
(3)
| Scheme | Marks |
|---|---|
| \(2y - -y = 3 - 6\) or \(x + 2x = 3 + 12\) | M1 |
| A1 | |
| \(x = 5,\ y = -1\) | A1 |
| (3) | |
| (3 marks) |
Notes
M1: for a complete method to eliminate one variable (condone one arithmetic error)
A1: \(x = 5\)
A1: \(y = -1\)
NB: Candidates showing no working score 0 marks