Question

Please help? I'll answer yours in return!!!!


If you were to use the substitution method to solve the following system, choose the new system of equations that would result if x was isolated in the first equation.x + 6y + z = 2x - 3y + 2z = -1x + 5y + 3z = -4

Answer options:

11y + 4z = 62y + 5z = 3

y - 2z = 6-8y - z = 3

3y + 3z = -311y + 4z = -6

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

Answer 1

(I think it's A...)

Answer 2

x + 6y + z = 2
x - 3y + 2z = -1
x + 5y + 3z = -4
i guess those are the equations

so isolate x from the first:

x = 2-6y-z

now plug x into the second and third :

2 - 6y -z - 3y +2z = -1
z - 9y = -3

2 - 6y -z + 5y + 3z = -4
2z -y = -6

so the two equations we have are :

z - 9y = -3
2z -y = -6

Answer 3

this is not A

Answer 4

:(((((

Answer 5

B?

Answer 6

i gave you the answer already .. now you should see which one is the same

Answer 7

C or D? I don't see this as clearly as I should

Answer 8

D
-9y + z = -3
-y + 2z = -6

same as mine :)

Answer 9

awwwww thank you kind sir