Question

Help me pleaseee . fan and medal
Solve the following system of equations:

2x + 3y − z = 1
3x + y + 2z = 12
x + 2y − 3z = −5

(3, 1, 2)

(−3, 1, 2)

(3, −1, 2)

(3, 1, −2)

Answer 1

@hero @myininaya @dan815

Answer 2

@aaronq

Answer 3

@hartnn @kropot72

Answer 4

C I believe

Answer 5

How'd you get C?

Answer 6

7x + 7y = 14
-(11x + 7y = 26) ~ -4x = -12 - - -> x=3

11(3) + 7y = 26
33 + 7y = 26 - - -> y=-1

2x + 3y - z = 1
2(3) + 3(-1) -z = 1
6 + (-3) -z = 1
3-z = 1
-z = 1-3
-z = -2 - - -> z=2