Solving Systems of Equations by Substitution is a method to solve a system of two linear equations. Solving Systems of Equations by Substitution follows a specific process in order to simplify the solutions. The first thing you must do when Solving Systems of Equations by Substitution is to solve one equation for either variable. Next, you must ... REINFORCE: Solve the following linear system of equations. a) 3 4 19 6 9 21 x y x y b) 3 2 14 4 2 16 x y x y c) 2 2 12 3 x y y x 6. After solving these problems, generalize the best time to use the substitution method.
Solve each system by substitution. Steps 1) Solve one of the equations for x or y. • This is already done for you for this section. 2) Substitute the expression into the other equation and solve for the variable. 3) Once you solved one for one of the variables, plug this solution into one of the original equations and solve for the other variable. 4) Check your answer by plugging it back into