Question

solve each system of equations:
1) 5x+4y-z=1
2x-2y+z=1
-x-y+z=2

i got x=0, y=-1, z=-1, is that correct?

Answer 1

For the first equation: 0 - 4 + 1 does not equal 1

Answer 2

well then what should i do?

Answer 3

These get messy ... start again ... which variable do you want to eliminate first?

Answer 4

I suggest eliminating z: From the first two equations we get

7x + 2y = 2

and from the first and the third we get

4x + 3y = 3

Answer 5

oh i got 7x-2y=2 and 4x-3y=3...

Answer 6

That happens to me too ..

4y - 2y = 2y

and

4y - y = 3y

Answer 7

oh ok so anyways i tried it with your equations and i still got x=0...

Answer 8

y=1 and z=3?

Answer 9

Yes, x = 0

Answer 10

Yes, the solution is (0, 1, 3)

Answer 11

oh ok thanks so much!