The elimination method can be extended from solving a system of equations with two variables to solving a system with three variables. Watch the tutorial to find out how!
Solving an equation for a variable? Perform the order of operations in reverse! Check it out in this tutorial.
A system of equations is a set of equations with the same variables. If the equations are all linear, then you have a system of linear equations! To solve a system of equations, you need to figure out the variable values that solve all the equations involved. This tutorial will introduce you to these systems.