Learn how to solve simultaneous equations using substitution, algebraic and graphical methods with this BBC Bitesize Key Stage 3 Maths guide, then practise with examples and test questions.

Simultaneous equations with non-matching coefficeints Watch this video to learn about how to solve simultaneous equations using the substitution method.

Among the well-known collections are IMSL, NAG and LINPACK. However, a direct solution method should be used in the case of dense non-structured matrices.