- 解下列方程组(1)2x-y=83x+2y=5(2)3x+y-4z=135x-y+3z=5x+y-z=3.
- 解下列方程组(1)3s-t=5①5s+2t=15②(2)3x+4z=7①2x+3y+z=9②5x-9y+7z=8③.
- (1)6x-9y=55x+3y=3;(2)(x-3)2-(x-4)(x+8)≥5(x+10)
- 解方程组:(1)x-32-3(y-1)=02(x-3)-2(y-1)=10(2)a-b+c=04a+2b+c=39a-3b+c=28.
- 解方程组(1)x-y=12x+y=2(2)3x+2y=52x+5y=7(3)4(x-y-1)=3(1-y)-2x2+y3=2(4)
- 解下列方程组或不等式(1)4x+y=52x-3y=13;(2)2x+y=-62y+z=-92z+x=-3;(3)4x+35<7-x2+1;(4)x-22-(x-1)<1.
- 解下列方程组:(1)6x-2y=11x+4y=4(2)4x-9z=173x+y+15z=18x+2y+3z=2
- ①y=x-22x+y=7;②2x-3y=10-4x+y=-5;③3x-y+z=42x+3y-z=12x+y+z=6.
- 解方程组:(1)3x-4y=-75x+2y=23(2)2x+3y-z=33x-2y+z=4x+2y+z=10.
- 解下列方程组(1)3x+2y=473x-2y=19(2)x+2y-z=62x+y+z=93x+4y+z=18.
- 解下列方程组(1)x=2y3x+2y=16(2)x+y+z=62x+3y+z=113x-y-z=-2.
- 解下列方程组:(1)2x+y-1=0x-2y+12=0;(2)x+y+z=1x-2y-z=32x-y+z=0.
- 解方程组:(1)3x-4y=5x+3y=6;(2)x+y=5x+z=7y+2z=13.
- 解下列方程组:(1)5x+6y-16=07x-9y-5=0(2)x+y+z=12x+2y-z=63x-y+z=10
- 解下列方程组:(1)12x+32y=45x-3y=4;(2)3x-y+z=42x+3y-z=12x+y+z=6.