已知4x-3y-6z=0,x+2y-7z=0,求5x+2y-z/2x-3y-10z

已知4x-3y-6z=0,x+2y-7z=0,求5x+2y-z/2x-3y-10z
已知4x-3y-6z=0,x+2y-7z=0,求5x+2y-z/2x-3y-10z

已知4x-3y-6z=0,x+2y-7z=0,求5x+2y-z/2x-3y-10z
4x-3y-6z=0---(1)
x+2y-7z=0---(2)
整理(1)(2)
4x-3y=6z---(3)
x+2y=7z---(4)
(3)*2+(4)*3
11x=33z
x=3z
(4)*4-(3)
11y=22z
y=2z

4x-3y-6z=0---(1)
x+2y-7z=0---(2)
整理(1)(2)
4x-3y=6z---(3)
x+2y=7z---(4)
(3)*2+(4)*3
11x=33z
x=3z 就是这样
(4)*4-(3)
11y=22z
y=2z