Question

Which ordered triple is a solution of the following linear system?:

2x + 3y + 2z = 26
-x + 7y - z = 21
3x + 2y - 5z = 13

Answer 1

elimination is needed

Answer 2

can we do matrices?

Answer 3

idk what that is

Answer 4

ok well
again try multiply the second equation by 2 and adding the new equation to the first equation

Answer 5

you have
first equation is 2x+3y+2z=26
second equation is
-2x+14y-2z=42
-----------------
now add these equations together

Answer 6

i got .. -2+14y-2z=42

Answer 7

2x+(-2x) is not -2
3y+14y is not 14y
2x+(-2x) is not -2z
26+42 is not 42

Answer 8

im confused u lost me now .. u said to multiply the equation by 2 .

Answer 9

the second by positive 2 yes

Answer 10

you have
first equation is 2x+3y+2z=26
second equation is
-2x+14y-2z=42
-----------------
now add these equations together

Answer 11

17y=68
y= 4

Answer 12

yes!
i have to go
sorry

Answer 13

noooo . please juss 5 more mins.

Answer 14

i'm back if you are still here