Could you explain the steps, I keep getting stuck and getting decimals.
1.
3x-y+4z=15
2x+y-z=-8
x+5y-2z=-19
2.
r+2s-4t=-15
-6r+s+2t=-24
2r-s-3t=0
3.
4x-3y-6z=-24
6x+5y-6z=14
-4x+6y-4z=-4
4.
-5a-2b+3c=-16
-a-b-c=5
-2a+2b-5c=10
5.
-x+y-z=-3
3x-2y-4z=22
-3x+y+3z=-19
6.
-x+y-4z=12
2x-5y+3z=-17
-6x-2y+4z=8
