Higher November 2022 Paper 1 Q12
12 Solve the simultaneous equations
\[\begin{aligned} 5x + 2y &= 11 \\ 4x + 3y &= 6 \end{aligned}\](4)
| Answer | Mark | Mark scheme |
|---|---|---|
| \(x = 3\), \(y = -2\) | M1 | for a correct method to eliminate either variable or rearrangement of one equation leading to substitution (condone one arithmetic error) |
| A1 | for either correct value of \(x\) or correct value of \(y\) | |
| M1 | (dep M1) for a correct substitution of found value into one of the equations or a correct method leading to the second value (condone one arithmetic error) | |
| A1 | \(x = 3\), \(y = -2\) |
Additional guidance
Trial and improvement methods score 0 marks unless both \(x\) and \(y\) are correct