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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

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7.4 Solving Linear Systems by Substitution.notebook 4 January 21, 2015 Jan 20­1:02 PM Ex(1) Solve this system of linear equations by substitution. y = x + 1 y = 3x ­ 1 How can you check your answer? y = x + 1 y = 3x ­ 1 Option #1: Substitute values back into original equations Option #2: Graph the linear system

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To estimate the solution of this system, make a graph and estimate the point of intersection. The intersection point is about (23, 760). You can also find the solution by using the substitution method. Substitute 900 6x(from the first equation) for yin the second equation, and solve the resulting equation.

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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.

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Solve systems of linear equations by graphing, substitution, and elimination. Solve systems of linear inequalities by graphing. KY Program of Studies HS-AT-S-EI6 Students will solve systems of two linear equations in two variables. HS-AT-S-EI14 Students will graph the solution set of a system of two or three linear inequalities.

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Learn to solve a system by substitution. Brian McLogan. • How To Solve Linear Systems Using Substitution By Avoiding Fractions! Solve the following systems by substitution.