substitute the value into either equation and solve check ... for 2.6 solving systems...solving...

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First_Degree6.notebook 1 September 16, 2013 Oct 37:15 AM 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 = 8 ½ x y = 18 Oct 37:15 AM Step 3: substitute the value into either equation and solve Step 4: check your solution

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Page 1: substitute the value into either equation and solve check ... for 2.6 Solving systems...Solving Systems Algebraically U2S4: I can solve systems of equations algebraically. Step 1:

First_Degree6.notebook

1

September 16, 2013

Oct 3­7:15 AM

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

Oct 3­7:15 AM

Step 3: substitute the value into either equation and solve

Step 4: check your solution

Page 2: substitute the value into either equation and solve check ... for 2.6 Solving systems...Solving Systems Algebraically U2S4: I can solve systems of equations algebraically. Step 1:

First_Degree6.notebook

2

September 16, 2013

Oct 3­7:15 AM

Example:  solve by substitution

x + 2y = 8½x ­ y = 18

Oct 3­7:15 AM

Example:  solve by substitution

x + 4y = 26x ­ 5y = ­10

Page 3: substitute the value into either equation and solve check ... for 2.6 Solving systems...Solving Systems Algebraically U2S4: I can solve systems of equations algebraically. Step 1:

First_Degree6.notebook

3

September 16, 2013

Oct 3­7:15 AM

Example:  solve by substitution

y = x + 4x ­ y = 4

Oct 3­7:15 AM

Example:  solve by substitution

4x ­ 2y = 66x ­ 3y = 9

Page 4: substitute the value into either equation and solve check ... for 2.6 Solving systems...Solving Systems Algebraically U2S4: I can solve systems of equations algebraically. Step 1:

First_Degree6.notebook

4

September 16, 2013

Oct 3­7:15 AM

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.

Sep 5­8:02 AM

Page 5: substitute the value into either equation and solve check ... for 2.6 Solving systems...Solving Systems Algebraically U2S4: I can solve systems of equations algebraically. Step 1:

First_Degree6.notebook

5

September 16, 2013

Sep 5­8:02 AM

Sep 5­8:02 AM

Page 6: substitute the value into either equation and solve check ... for 2.6 Solving systems...Solving Systems Algebraically U2S4: I can solve systems of equations algebraically. Step 1:

First_Degree6.notebook

6

September 16, 2013

Sep 5­8:02 AM

Sep 5­8:04 AM