Question

x + y – z = –1

x + y + z = 3

3x – 2y – z = –4


x=? y=? z=?

Answer 1

is this for lin alg?

Answer 2

@merandakay ?

Answer 3

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

Answer 4

Pre Calculus. Systems of Equations in Three Variables.

Answer 5

-2z = -4 z = 2

Answer 6

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...

Answer 7

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

Answer 8

y=1 and x=0 z=2

Answer 9

true story

Answer 10

it's hard to explain how to solve this