Foundation June 2022 Paper 3 Q21
21 Solve the simultaneous equations.
\[3x + y = 11\]\[x + y = 3\][3]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| [\(x =\)] 4 [\(y =\)] \(-1\) | 3 | M1 for correct method to eliminate one variable B1 for \(x = 4\) B1 for \(y = -1\) If 0 scored SC1 for a pair of values that satisfy one of the original equations | Allow one arithmetic error in subtraction of terms or in rearrangement If previously rearranged must be correct rearrangement |