Alg. 1 6-3 Part 1

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6-3 Solving System of

Equations with Elimination

Open Ended

How did you feel with the quiz yesterday? With this chapter so far?

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Learning Target and Success Criteria

Learning Target

Success Criteria

❏

I can solve a system of equations
using addition or subtraction to
eliminate

❏

I will write my equations in
standard form ax + by = c

❏

I will find a variable that has the
same coefficients

❏

I will add or subtract as needed to
eliminate that variable

❏

I will solve the equation and use
the value to find the second value

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Elimination Method

●In order to use elimination method, you need to have both equations in
standard form: ax + by= c

●You need to have the same variable have coefficients that are opposite

●When you have that you will add both equations and the variable should
cancel/eliminate

●Solve for the variable that is left and go back to find the other variable

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Use elimination to solve the system of equations

Example

Poll

How do you feel with this example?

• I understood it

• I kinda understand it

• I have no clue

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Use elimination to solve the system of equations

Example

Open Ended

What is your solution?

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Example

Use elimination to solve the system of equations

Multiple Choice

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Multiple Choice

Solve the system of Equation (x,y) 3x + y = –14 –2x – y = 9

• (-5,1)

• (5,-1)

• (5,4)

• (-5,4)

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Use elimination to solve the system of equations

Example

Poll

How do you feel about this section?

• I understand it

• I am getting it, but need more practice

• I kinda get it but I am still a bit lost

• I have no idea what is going on!

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Learning Target and Success Criteria

Learning Target

Success Criteria

❏

I can solve a system of equations
using addition or subtraction to
eliminate

❏

I will write my equations in
standard form ax + by = c

❏

I will find a variable that has the
same coefficients

❏

I will add or subtract as needed to
eliminate that variable

❏

I will solve the equation and use
the value to find the second value