Solve algebraically the simultaneous equations
3x2+y2=21 3x^2 + y^2 = 21 3x2+y2=21 2x−y=1 2x - y = 1 2x−y=1117 exam-style questions on AQA GCSE Maths Quadratic Simultaneous Equations. Each one has a worked solution and a mark scheme showing where the marks go.