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Solving Systems of Linear Equations Using Linear Combination (Elimination)
The video you are about to watch is designed to introduce you to solving systems of linear
equations using our 3rd method known as Linear Combination or Elimination. Follow along
with the video and take notes as you go.
http://www.phschool.com/atschool/academy123/english/academy123_content/wl-book-demo/ph-233s.html
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Solve the following systems of linear equations using the Linear Combination method.
Things to think about as you work:
1.)
x  y  4

x  y  2
2.)
4 x  y  7

4 x  2 y  2
Which variable cancels out?
Combine the like terms!!
Check:
3.)
2 x  y  5

2 x  y  3
Check:
4.)
3 x  2 y  7

2 x  2 y  2
Which variable cancels out?
Combine the like terms!!
Check:
Check: