x + y – z = –1

x + y + z = 3

3x – 2y – z = –4

x=? y=? z=?

Question

x + y – z = –1

x + y + z = 3

3x – 2y – z = –4 


x=? y=? z=?

zzr0ck3r · Answer

is this for lin alg?

zzr0ck3r · Answer

@merandakay ?

anonymous · Answer

start by solving for one variable. z is easiest to start with. take the first 2 equations and subtract one from the other

anonymous · Answer

Pre Calculus. Systems of Equations in Three Variables.

anonymous · Answer

-2z = -4    z = 2

zzr0ck3r · Answer

then there are a few ways to solve. The wasy way is with matricies but I guess thats a no go. you can solve any equation for say z then plug that into another equations for all z then solve that for y and plug that into the last equation for y and then solve for x...

anonymous · Answer

x+y=1
x+y=1
so the first two are the same equation

anonymous · Answer

y=1 and x=0  z=2

anonymous · Answer

true story

anonymous · Answer

it's hard to explain how to solve this