# Systems of Equations

Reference > Mathematics > AlgebraSolving Systems of equations - an introductory explanation and unit outline

Solving systems of equations in two unknowns using the addition method

Solving systems of equations in two unknowns, in which the terms need to be rearranged to help properly combine them

Solving systems of two equations in two unknowns using the substitution method

How to determine whether a system of equations is indeterminate, or inconsistent

Solving word problems which involve two variables involves converting the information into two equations

Solving systems of equations involving fractions, with variables in the numerator - or the denominator

How to solve a system of three equations in three unknowns

# Understanding Coronavirus Spread

A Question and Answer session with Professor Puzzler about the math behind infection spread.

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