Question

solve system of equation:
x+y=-1
y-z=4
2x+y+5z=-38

Answer 1

You can use y-4=z instead of z in the third equation...

Do you know rest of the solution...?

Answer 2

plug it into your calculator!

Answer 3

i got 13,-14, and 10 or -10 and something still not adding up right

Answer 4

What's the problem...?

Answer 5

y - z = 4 ---> z = y - 4

x + y = -1 ---> x = -y-1 then plug these into third one...

2x + y + 5z = -38 ----> 2(-y-1) + y + 5(y-4) = -38 ....

-2y-2+y+5y-20=-38 ----> 4y=16 y=...

then plug y in other equations to find x and z...