方程组:3x+y=9 x+7y=10
解方程组 2x+y(y-2x)=9 (x+y)(x+y-3)=10
y-3x=2,y-5x=4,y-7x=6,y-9x=8,y-11x=0方程组,
一次方程组x=y+3 (10y+x)+(10x+y)=99 怎么解
解方程组X+Y/2=3X-2Y=10+6X+Y/4
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
已知方程组{3x+4y=10 4x+3y=-2,不解方程组则x+y=
解方程组:2/(x+y)+5/(x-y)=18 9/(x+y)-10/(y-x)=66
解方程组:2/(x+y)+5/(x-y)=18 9/(x+y)-10/(y-x)=66
解方程组:(x+3)(y-2)=(x-3)(y+10),(x+1)(y+3)=(x-2)(y+12)
用加减法解方程组:{(x+y)/6+(x-y)/10=3 (x+y)/6+(y-x)/10=-1
解方程组x+y/6+x-y/10=3,x+y/6+y-x/10=-1
解二元一次方程组:{5(x+y)+3(x-y)=2{7(x+y)-3(x-y)=-6