anonymous
  • anonymous
If you wanted to eliminate the y variable by adding the two equations in the following system, what could be your first step? x - y = 6 -4x - 4y = 10
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
Multiply the second equation by -4. Add the two equations together. Multiply the first equation by 4. Multiply the first equation by -4.
anonymous
  • anonymous
Multiply the second equations by -4
anonymous
  • anonymous
You shouldn't multiply the second equation by -4 because it wouldn't cancel out the variable x. You should multiply the first equation by 4. Then you will have this: 4x - 4y = 24 -4x - 4y = 10 And the x variables will cancel each-other out and you can solve for y.

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