mandilynn22 mandilynn22

19-11-2018
Mathematics

contestada

In the solution to this system, what is the value of y?

x+y+z=1

2x+y-z=8

x-y+z=15

y=______

The solution is ?

Respuesta :

TheKoolKid1O1 TheKoolKid1O1

19-11-2018

y=-7

hope this helps you

Answer Link

apologiabiology apologiabiology

19-11-2018

solve by linear combination

add 1st and 2nd equation together to get

3x+2y=9

add 2nd and 3rd equation together to get

3x=23

divide by 3

x=23/3

sub into other one

3x+2y=9

23+2y=9

2y=-14

y=-7

Answer Link

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