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Systems of Equations. Elimination
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tsalter_815070
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Systems of Equations Elimination
Combining Linear Equations
A.REI.5
I CAN solve a system of equations by elimination.
- Slide 2Report an issue
- Question 330 secondsReport an issueQ.
I can combine 2 linear equations if the coefficients are not opposites.
answer choices - Question 4120 secondsReport an issueQ.
Solve by elimination:
3x+7y=23
-3x-7y=-17
answer choices - Question 5120 secondsReport an issueQ.
Solve using elimination.
4x + 8y = 20
-4x + 2y = -30
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- Slide 7Report an issue
- Question 8Ungraded30 secondsReport an issueQ.
For the following equations, which coefficients would be easier to make opposites?
2x + 3y = 12
4x - 7y = - 54
no correct answer - Question 930 secondsReport an issueQ.
Let's multiply the top equation by -2. What would be our new equation?
2x + 3y = 12
4x - 7y = - 54
answer choices - Question 1030 secondsReport an issueQ.
Now, our equations will look like this
-4x - 6y = -24
4x - 7y = - 54
Let's combine (add) these 2 equations to ELIMINATE the x variable. What would our combined equations be?
answer choices - Question 1130 secondsReport an issueQ.
Let's solve for y.
-13y = -78
answer choices - Question 1230 secondsReport an issueQ.
Now, let's find the solution to the system.
2x + 3y = 12
4x - 7y = - 54
answer choices - Question 13900 secondsReport an issueQ.
Your Turn:
Solve by elimination
2x + 9y = -7
6x - 3y = 9
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