Foundation November 2019 Paper 3 Q16
16 Solve the simultaneous equations.
\[\begin{aligned} 2x - y &= 7 \\ 2x + y &= 5 \end{aligned}\][3]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| [\(x =\)] 3 [\(y =\)] \(-1\) | 3 | M1 for correct method to eliminate one variable B1 for \(x = 3\) B1 for \(y = -1\) If 0 scored SC1 for correct substitution in a given equation and correct evaluation to find other variable | Allow one error in addition or subtraction of terms or in rearrangement If previously rearranged must be correct rearrangement |