In algebra, letters are used to stand for values that can change (variables) or for values that aren’t known (unknowns). A term is a number or letter on its own, or numbers and letters ...

The remaining unknown can then be calculated. In this example both equations have \(+y\) A way to remember this is same signs subtract, different signs add. Calculate the value of the remaining ...

Linear algebra has become the subject to ... it passes on to the classical topics of solving linear equations, orthogonality, linear transformations and subspaces, all clearly explained with many ...