1MA0 Higher June 2014 Paper 1 Q18
18 Solve the simultaneous equations \[\begin{aligned} 4x + y &= 25 \\ x - 3y &= 16 \end{aligned}\] (3)
| Answer | Mark | Notes |
|---|---|---|
| \(x = 7\) \(y = -3\) | 3 | M1 for correct process to eliminate one variable (condone one arithmetic error) M1 (dep) for substituting found value in one of the equations or appropriate method after starting again (condone one arithmetic error) A1 for \(x = 7\) and \(y = -3\) |