Solve the following system of equations.

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

(1, 3, 2)

(–1, 3, 2)

(1, –3, 2)

(1, 3, –2)

Question

Solve the following system of equations.

2x – y + z = –3
2x + 2y + 3z = 2
3x – 3y – z = –4

 (1, 3, 2)

 (–1, 3, 2)

 (1, –3, 2)

 (1, 3, –2)

anonymous · Answer

you can check which one works, which is probably a hell of a lot shorter than computing the solution by elimination

lgbasallote · Answer

that's no fun...

anonymous · Answer

if it was me, i would cheat http://www.wolframalpha.com/input/?i=2x+%E2%80%93+y+%2B+z+%3D+%E2%80%933%2C+2x+%2B+2y+%2B+3z+%3D+2%2C+3x+%E2%80%93+3y+%E2%80%93+z+%3D+%E2%80%934

lgbasallote · Answer

or guess...

parthkohli · Answer

My start would be adding equation 1 and 3, but I am not good at starts :(

mathmate · Answer

There's another way to cheat:
Add all three equations together to get 7x-2y+3z=-5
Check all four answer to see if they work on this single equation.
If more than one works, then check individually.