Question

solve this system of equations
x+y+z=-2
2x+5y+2z=2
-x+7y-3z=24

Answer 1

Add the first and third equations together to make it easier

Answer 2

Than add that result to the middle equation

Answer 3

Then solve for y

Answer 4

y=2, x=-1, z=-3 Use elimination method.

Answer 5

Many ways to approach, but you can solve for y by taking the second equation and subtracting the first equation multiplied by 2.

Answer 6

Yeah, my approach didn't help much

Answer 7

2x +5y + 2z = 2
2x +2y + 2z = -4
-----------------
3y = 6
y=2

Now you take it from there.

Answer 8

Hero it did eliminate one of the unknowns, so it was a good start.

Answer 9

Now substitute for y from what you got with Hero suggestion.
8y-2z=22
16-2z=22
-2z=6
z=-3 Now you are home free.