Question

Solve this system of equation.

2x+4y+z=1
-4x-2y+2z=22
-2x-6y-4z=-14

Answer 1

one approach
using eqn1 find the expression for z then substitute in eqn 2
using this expression for z substitute in eqb 3 as well
you will now have simultaneous eqn with 2 variables (x and y)
there are about 4 methods to choose from to solve. Can you solve 2-variable eqn?
with those values of x and y substitute in the expression for z to get that value,

notice that if you add eqn 1 and eqn 3 you can elimiinate x


work with this and let me know if you need more

Answer 2

eqn1: z = -2x-4y+1

Answer 3

eqn2: -8x-10y=20

Answer 4

im confused what to do next