就用通俗的方法给你解答吧(其实用线性代数很方便):3x+2y+z=39 (1)2x+3y+z=34 (2)x+2y+3z=26 (3)(1)式-(2)式得:x-y=5 (4)3*(2)-(3)式得:5x+7y=76 (5)由(4)(5)两式得x=111/12,y=51/12,z=11/4
3x+2y+z=39 2x+3y+z=34 x+2y+3z=26