用消元法解方程:5x-3y+6z=6,x+1=(3z-4y)/2,10x+12y-6x=-3

问题描述:

用消元法解方程:5x-3y+6z=6,x+1=(3z-4y)/2,10x+12y-6x=-3

5x-3y+6z=6 (1)x+1=(3z-4y)/22x+4y-3z=-2 (2)10x+12y-6x=-3,错了是10x+12y-6z=-3 (3)(1)+(3)15x+9y=35x+3y=1 (4)(1)+2*(2)5x-3y+4x+8y=6-49x+5y=2 (5)(4)*5-(5)*325x-27x=5-6x=1/2y=(1-5x)/3=-1/2z=(6-5x+3y)/6=1/3...