Matrices and systems of equations
In linear algebra, a rectangular array of numbers is called a matrix. For many
problems in mathematics, economics, and other fields, arranging numbers in such
blocks turns out to be very useful – for example, in solving systems of equations,
analyzing the evolution of dynamic systems and so on. Working with blocks of
numbers requires a methodology for the manipulation of such arrays, so that
addition, subtraction, multiplication and other algebraic procedures are defined.