3x+4y=15 2x-4y=10 解放程组,
3x+4y=15 2x-4y=10 解放程组,
解放程组2X-3Y=X+2=3X+Y
解放程x+y-z=4,2x-y+x=5,x-3y+x=-2 3x-2y=8,2y+3z=1,x+5z=7
解放程组2x-y=7,5x+3y+2z=2,3x-4z=4
解放程:(2X+3Y-Z-2)的绝对值+(3X+2Y-Z-2)的平方+根号(4X-5Y+6Z+17)=0
解方程组 10(x-y)=3(x+y)+15 6(x+y)=4(2x-y)+16
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20
{(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20
4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27