Study Guide?
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.

Question

Study Guide?
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.

pooja195 · Answer

Keeping in mind that opposites cancel what would you multiply by?

anonymous · Answer

Equation B by 2? Im not sure if that would cancel X or Z out?

pooja195 · Answer

Not quite whats the opposite of 3?

anonymous · Answer

Negative 3.... so you would multiply the equation by that?

pooja195 · Answer

yes! :D 
-3+3=0 therefore the z term cancels

anonymous · Answer

Thanks so much!

pooja195 · Answer

Do you understand?

anonymous · Answer

Yes, thank you.

pooja195 · Answer

:) 
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