解三个变量的线性方程组

代数

求下列线性方程组的解:

$\{对齐}开始x + 3 y + 3 z & = 8 x + 3 y + 4 z \ \ & = 1 \ \ 4 x + y + 3 z & = 4。结束\{对齐}$

X =5 y=7 z=-27

X =0, y=-33, z=14

X =-41, y=4, z=7

X =3, y=10, z=-21