anonymous
  • anonymous
A student is trying to solve the set of two equations given below: Equation A: x + z = 6 Equation B: 2x + 3z = 1 Which of the following is a possible step used in eliminating the z-term? Multiply equation B by 3. Multiply equation A by 2. Multiply equation B by 2. Multiply equation A by −3.
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
anonymous
  • anonymous
Make the top z equal to the negative of the bottom z.
Sachintha
  • Sachintha
Raise the coefficient of z so that it will have a negative value with the same magnitude of z in B.

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anonymous
  • anonymous
well I have done the work would it be A @LegendarySadist
anonymous
  • anonymous
bc im not sure
anonymous
  • anonymous
No, it would not
Sachintha
  • Sachintha
@LegendarySadist There are two answers. Isn't it?
Sachintha
  • Sachintha
Sorry one :)
anonymous
  • anonymous
Well there would be 2 if we could use addition OR subtraction and weren't going specifically for the z term. But for the z term, there's only one, yeah.
Sachintha
  • Sachintha
It would have two answers if it was like this, Multiply equation A by 3. :D
anonymous
  • anonymous
its -3

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