Use a graph to find the solution of a pair of linear equations in two variables. Graph the solution set of a system of linear inequalities in two variables. Use a computer or graphics calculator to solve systems of linear equations Use the substitution method to find the solution of a pair of linear equations in two variables Use the addition or subtraction method to find the solution of a pair of linear equations in two variables. Use multiplication with the addition or subtraction method to solve system s of linear equations Use systems of linear equations to solve problems