Simultaneous Equations: Edexcel GCSE 1MA0 Higher November 2016 Paper 1 Q19

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1MA0 Higher November 2016 Paper 1 Q19

EdexcelHigherOld spec3 marksSimultaneous Equations

19 Solve the simultaneous equations

\(2x - y = 13\)
\(x - 2y = 11\) (3)

Mark scheme

Working	Answer	Mark	Notes
\(4x - 2y = 26\) \(x - 2y = 11\) \(3x = 15\) \(2x - y = 13\) \(2x - 4y = 22\) \(3y = -9\)	\(x = 5\) \(y = -3\)	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 \(x = 5\) and \(y = -3\)