substitute the value into either equation and solve check ... for 2.6 solving systems...solving...
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First_Degree6.notebook
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Solving Systems Algebraically
U2S4: I can solve systems of equations algebraically.
Step 1: solve one of the equations for one of the variables
Step 2: substitute for that variable in the other equation and solve
x + 2y = 8½x y = 18
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Step 3: substitute the value into either equation and solve
Step 4: check your solution
First_Degree6.notebook
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Example: solve by substitution
x + 2y = 8½x y = 18
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Example: solve by substitution
x + 4y = 26x 5y = 10
First_Degree6.notebook
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Example: solve by substitution
y = x + 4x y = 4
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Example: solve by substitution
4x 2y = 66x 3y = 9
First_Degree6.notebook
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Assignment: Unit 2, Lesson 6
U2S4: I can solve systems of equations graphically and algebraically.
3. 4.
1. 2.
Show your work on your own paper.
Solve by graphing. Classify the system. Use your own graph paper.
5. 6. 7.
8.
a.
b. Solve the system by substitution. State the answer in the context of the problem.
9.
a.
b.
c.
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