Eliminate the “z” variable in the first two equations by finding opposite coefficients and adding. What is the resulting equation?

4x – y + z = 6
3x + 2y – z = 0
4x – y – 3z = 2

Question

Eliminate the “z” variable in the first two equations by finding opposite coefficients and adding. What is the resulting equation?

4x – y + z = 6
3x + 2y – z = 0
4x – y – 3z = 2

amistre64 · Answer

they already HAVE opposite coeffs

amistre64 · Answer

so just add them together :/

anonymous · Answer

x + y = 6
		7x + y = 6
		7x – y = 6
		x – y = 6
these are the answers ...

amistre64 · Answer

those are the options, not the answers; only one of the options is the answer .....

amistre64 · Answer

add the first 2 eqs and what do we get?

anonymous · Answer

7x+y=6

amistre64 · Answer

4x –   y + z = 6
3x + 2y – z = 0
--------------
7x +1y -0z = 6

amistre64 · Answer

I agree :)