Hey I need so help bad!
3x=-12
1=x+y+2z
2x-y=-9
I have tried the 5 or six times but I can never get the right answer...
I need help...

Sorry I forgot to add the 2z...

x=-4
y=-10

Hey i need so help bad!!
3x=-12
1=x+y+2z
2x-y=-9
I have tried the 5 or six times but i can never get the right answer...
I need help...

Sorry i forgot to add the 2z...
From Eq 1, x = -4.

In Eq 3, substitute -4 for x, and solve for y =1.

In Eq 2, substitute known values for x and y, and solve for z.