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Know if an ordered pair is a solution to a system of linear equations in two variables or not. Solve a system of linear equations in two variables by graphing. Solve a system of linear equations in two variables by the substitution method. Solve a system of linear equations in two variables by the elimination method. In this tutorial we will be specifically looking at systems that have two equations and two unknowns. Tutorial 20: Solving Systems of Linear Equations in Three Variables will cover systems that have three equations and three unknowns.
c Benjamin Aurispa. 4.3-4.4 Systems of Equations. A linear equation in 2 variables is an equation of the form ax+ by = c. A linear equation in 3 variables is an equation of the form ax+ by + cz = d. To solve a system of equations means to nd the set of points that satisfy EVERY equation in the system.