解方程组 (1){2x-y=5,x-2y=1 (2){7x+3y=5,-5x+6y=-9完整列式,
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解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
解方程组:x+y=2x+y+1=5x+2y+1
解方程组{(x-2)(y+3)=(x+1)(y-1) {(x+1)(y+1)=(x-1)(y+5)
解方程组 3(x+y)-2(x-y)=9,5(x+y)+2(x-y)=-1
解方程组:{3(x+y)-2(x-y)=9,5(x+y)+2(x-y)=-1}
解方程组:x+y/2+x-y/3=6,(x+y)+5(x-y)=38 谢.
解方程组6(x-y)-7(x+y)=21 2(x-y)-5(x+y)=-1
3/(X-Y)+10/(X+Y)=-5 2/(X-Y)-15/(X+Y)=1 解分式方程组
10/x+y+3/x-y=-5 15/x+y-2/x-y=-1(用换元法解此方程组)
解方程组 2x-y=5 2y/x-x/y=12x-y=52y/x-x/y=1
解方程组|x-2|+|y+1|=5|x-2|=4(y+1)
利用图像解方程组:(1)x-y=-1,5x-2y=4
解二元一次方程组 x+y=3 1/2(x+y)-3y=5
二元一次方程组 2(X+Y)-(X-Y)=3 (X+Y)-2(X-Y)=1 解方程组二元一次方程组 2(X+Y)-(X-Y)=3 (X+Y)-2(X-Y)=1
1/2x-2y=-74,x-6y=-12解方程组,x/5-y/2=2,2x+3y=4解方程组
解方程组:{3|x|-2y=8 2|x|+5y-1}解方程组:3|x|-2y=8 2|x|+5y-1
解方程组{x+y=8,5x-2(x+y)=-1
解方程组:1、6(x-y)-2(x-y)=14 2、3(x-y)+(x+y)+5 怎么解=5