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- 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.

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- anonymous

- chestercat

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- anonymous

- anonymous

Make the top z equal to the negative of the bottom z.

- 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

well I have done the work would it be A @LegendarySadist

- anonymous

bc im not sure

- anonymous

No, it would not

- Sachintha

@LegendarySadist There are two answers. Isn't it?

- Sachintha

Sorry one :)

- 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

It would have two answers if it was like this,
Multiply equation A by 3. :D

- anonymous

its -3

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