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? 5x − 6y = 6 x − y = 12 Add the two equations together Multiply the second equation by −6 Multiply the first equation by −6 Multiply the second equation by 6
Mathematics
chestercat
  • chestercat
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kropot72
  • kropot72
You can arrive at the correct choice by seeing which choice gives the requires result (eliminate the y variable). Would adding the two equations together eliminate the y variable when -6y + (-y) = -7y ?
anonymous
  • anonymous
no
kropot72
  • kropot72
Correct. Looking at the second choice, if you multiply the second equation by -6 the y variable becomes -y * -6 = 6y Would adding the two equations together eliminate the y variable when -6y + 6y = 0 ?

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anonymous
  • anonymous
yes
kropot72
  • kropot72
You have your answer then.
anonymous
  • anonymous
so a?

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