Question

Question 3, picture attached.

Answer 1

I am denied access to it?

Answer 2

AccessDenied !

Answer 3

Ok give me a sec

Answer 4

Better?

Answer 5

Aha (y)
Wait a min I will solve it for U :)

Answer 6

DON'T DO IT FOR HIM

Answer 7

Engage him

Answer 8

Tell me how to.

Answer 9

Yeah okay so take the first equation solve for y what do you get?

Answer 10

I don't know

Answer 11

Give me a sec

Answer 12

-5

Answer 13

OMG nooo, i just wanted you to make it y=-5x-21

Answer 14

Ohhh see I'm uber confused. ok

Answer 15

What next?

Answer 16

The you plug in your answer for y in the second equation

Answer 17

ok then?

Answer 18

So once you have plugged in y you have only 2 variables left in those equations. Now solve for z in the third equation

Answer 19

First of all take the first equation : get y from the Left hand side to the right hand side and 21 from right hand side to the left one the you get : y = -5x - 21
Then take the third equation and do same steps with z , then you get : z = -3x -12
Take both of the above equations and plug into the second "middle" one, then you get :
3x + 20x + 84 - 15x - 60 = -8
solving this equation for x then you will get x to be equal to -4
substituting back by this value in the equations of both y and z we got above we obtain values for both y and z which are supposed to be equal to -1 and 0 ,
Then the answer will be (-4,-1,0) which is D .

Let me know if you got it :)

Answer 20

Yes I totally get it. Thanks omar

Answer 21

You are welcome :)