Solving Systems of Equations by Elimination
Presentation
•
Mathematics
•
8th Grade
•
Hard
Standards-aligned
Jessica Farrow
Used 1+ times
FREE Resource
2 Slides • 2 Questions
1
elimination Method
Line up like terms for all equations
Look for inverse coefficients that will eliminate one variable. If you can't find some, make some by multiplying
Eliminate one variable by adding the equations Vertically
solve for the other
Use the new value from #3 to find the other variable's value
When is best to solve by graphing? substitution? elimination?
2
3x + x = 4
y - 2x = 6
3x - 2y =2
-3x + 5y = 13
3
Multiple Choice
Solve the following system by elimination.
x+y=8 and x=y=−2
(2, 6)
(5, 3)
(6, 4)
(3, 5)
4
Multiple Choice
Solve the following system by elimination.
2x−3y=14 and x+3y=−11
(1, 6)
(8, 2)
(1, -4)
(-2, 6)
elimination Method
Line up like terms for all equations
Look for inverse coefficients that will eliminate one variable. If you can't find some, make some by multiplying
Eliminate one variable by adding the equations Vertically
solve for the other
Use the new value from #3 to find the other variable's value
When is best to solve by graphing? substitution? elimination?
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