Question

What is the solution to the system of equations below?

Answer 1

add the second and third eqn together, what will u get?

Answer 2

-2.

Answer 3

-2 is on the right hand side of =

how about the left hand side?

Answer 4

1?

Answer 5

nope plz try again:

x-y+z=-1
x+y-z=3

add them together for both the left n right hand side of =

Answer 6

2?

Answer 7

yes -1+3 is equal to 2

Answer 8

but what about x-y+z and x+y-z part?

Answer 9

umm...x^2? Cuz -y and -z would be negated?

Answer 10

x-y+z + x+y-z is not equal to x^2 because x^2 means x*x

Answer 11

2x?

Answer 12

ok then 2x=?

Answer 13

2

Answer 14

so x=?

Answer 15

x=2

Answer 16

nope plz try again x=?

Answer 17

-2? or 0?

Answer 18

2x=? u just calculated that; scroll to see plz
so x=?

Answer 19

2x=2?

Answer 20

Correct

Answer 21

which is = to 1

Answer 22

also correct x=1...so u solve 1/3 of ur prob. already :)

Answer 23

okay so it's (1 ? ?)

Answer 24

lets try adding the 1st n 2nd eqn now

Answer 25

x+y+z=-1 and
x-y+z=-1

Show BOTH parts after adding them together plz

Answer 26

-1+-1=-2
2x+2z

Answer 27

u show write them out as one:

2x+2z=-2

do u understand that? it is important!

Answer 28

u should write....

Answer 29

2x + 2z= -2

Answer 30

Good! now u just found x=.....put that back in this new eqn.....

Answer 31

To get rid of z we turn it into a zero right? or a 1?

Answer 32

No no no...scroll up n see what is x equal to; then put that value into 2x+2z=-2 to find z

Answer 33

x= 1 or 2?

Answer 34

U just calculated it....scroll up and find ur ans plz

Answer 35

2x + 2z= -2
2(1) + 2z = -2
2 + 2z = -2
-2-2 = -4
2z=-4
z=-2

Answer 36

VERY GOOD! see it is not that complicated at all! so now u have found x and z...whats next?

Answer 37

umm...so its (1 ? -2) right? So we just need to solve for z now...

Answer 38

no, scroll up plz. u just found z=-2. last step is solve for y :)

Answer 39

okay for y...

Answer 40

Put x=1 and z=-2 into any one of the three eqns...then solve for y plz

Answer 41

x+y+z=-1 x-y+z=-1
1 + y -2 = -1 1 - y -2 = -1
-1 + y = -1 -1 - y= -1
y = 0 y = 0

Answer 42

very good: u should only have to do it once but hey u double-check and did it twice :P

Answer 43

Thank you so much!

Answer 44

welcome n thanks for staying w me :)