A student is trying to solve the set of two equations given below:

Equation A: x + z = 6
Equation B: 2x + 4z = 1

Which of the following is a possible step used in eliminating the z-term?
Multiply equation B by 4.
Multiply equation A by 2.
Multiply equation A by −4.
Multiply equation B by 2.

Question

A student is trying to solve the set of two equations given below:

Equation A: x + z = 6
Equation B: 2x + 4z = 1

Which of the following is a possible step used in eliminating the z-term?
Multiply equation B by 4.
Multiply equation A by 2.
Multiply equation A by −4.
Multiply equation B by 2.

panda.exe · Answer

@kenziedawn

texaschic101 · Answer

to eliminate the z term, one equation would have to have - 4z, and the other would have to have 4z...the opposite. so what could u multiply to make this happen ?

kenziedawn · Answer

i would say  the second one sorry if it is wrong

panda.exe · Answer

2 texas

texaschic101 · Answer

if u multiplied A by 2, u would get 2z...this cannot be eliminated

vijeya3 · Answer

@texaschic101 is right !
It must be multiplied by -4

texaschic101 · Answer

but if u multiplied A by - 4....you would have 4z and - 4z...this can be eliminated

panda.exe · Answer

ok so c?

texaschic101 · Answer

yes

panda.exe · Answer

ok thanks