New here. I need help plz!!

SOLVING SYSTEMS OF EQUATIONS IN THREE VARIABLES

(1)

x+y+z=4
2x-y+z=3
-4x=2y-z=-1

(2)

x+y-2z=-10
-4x=-8
3x+y=4

Question

New here. I need help plz!!

SOLVING SYSTEMS OF EQUATIONS IN THREE VARIABLES


(1)  

x+y+z=4
  2x-y+z=3
-4x=2y-z=-1

(2) 

 x+y-2z=-10
 -4x=-8
 3x+y=4

anonymous · Answer

(2) is easier, as you can start by getting x, then using the equation below it to get y and finally using the first equation to get z.

anonymous · Answer

(1) use value of z to get the first two equations without z.
Next, solve the two simultaneous equations in two variables as usual.

anonymous · Answer

Thanks but and really confused, can you help me with a two column proofs?  only 3 questions.

wolf1728 · Answer

Wow - you already asked 2 questions and now you are asking 3 more?

anonymous · Answer

i skipped that one cause am still having trouble.