Question

Solve the following system of equations.
2x – 3y + z = –1
2x – 2y – 2z = –8
x + 5y – 3z = 2

Answer 1

ok lets do this

Answer 2

first of all we want to eliminate a value

Answer 3

so you choose 2 of the equations and eliminate z

Answer 4

(2x-3y+z)2
2x-2y-2z

Answer 5

4x-6y+2z
2x-2y-2z

Answer 6

Okay, and then what do you do?

Answer 7

sec i gorgot the consonate

Answer 8

4x-6y+2x=-2
2x-2y-2z= -8

Answer 9

6x-8y=-10

Answer 10

2x – 3y + z = –1
2x – 2y – 2z = –8
x + 5y – 3z = 2

Answer 11

so now you take the equation we didnt use and eliminate z

Answer 12

x+5y-3z = 2
(2x-3y+z=-1)3

Answer 13

x+5y-3z=2
6x-9y+3z=-3

Answer 14

7x-4y=-3

Answer 15

7x-4y=-3
6x-8y=-10

Answer 16

any questions so far?

Answer 17

those are the 2 values we get after eliminating the z from equations

Answer 18

so we can solve for x and y now

Answer 19

(7x-4y=-3)2
6x-8y=-10

Answer 20

-2 oops

Answer 21

thank you soo much! i think i understand this a lot better now

Answer 22

-14x+8y=6
6x-8y=-10

Answer 23

-8x=-16

Answer 24

x=2

Answer 25

(7x-4y=-3)6
(6x-8y=-10)-7

Answer 26

42x-24y=-18
-42x+56y=-70

Answer 27

opps that +70

Answer 28

32y=52

Answer 29

y=52/32

Answer 30

y=13/8

Answer 31

so lets check our y value

Answer 32

6x-8y=-10

Answer 33

plug in x

Answer 34

6(2)-8y=-10