What is Algebra?

What is a equation?

Algebra is a branch of mathematics that substitutes letters for numbers. Algebra is about finding the unknown or putting real-life variables into equations and then solving them. Algebra can include real and complex numbers, matrices, and vectors.

An equation is a mathematical sentence that has two equal sides separated by an equal sign. 4 + 6 = 10 is an example of an equation ... For example, 12 is the coefficient in the equation 12n = 24. A variable is a letter that represents an unknown number.