解方程组3x-2y=1 2x-5y=-25
解方程组{(x-2)(y+3)=(x+1)(y-1) {(x+1)(y+1)=(x-1)(y+5)
解二元一次方程组 x+y=3 1/2(x+y)-3y=5
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
解方程组{ 3x-4y(x-y)=3 { 2x-3y=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: {3x+2y=13 3x-2y=5 {x-y/3=x+y/2+1 2x-5y=9
解方程组:解方程组:|X+Y|=1|X|+2|Y|=3
解二元一次方程方程组 3x+5y=8 2x-3y=-1的方程组 x+y=9 3(x+y)+2x=33已知方程组2x-y=
解方程组:(0.2x+0.1y)/2- (4x-y)/10=(x-y)/5+ (3x+0.5y)/30 (3x+2y-1
解方程组1.x+1/3=5x-y/5 7y=5x+25 (x=2,y=5) 2.2x-y/5=x+y/3=3(x=8,y
解方程组:(x+3)(y-2)=(x-3)(y+10),(x+1)(y+3)=(x-2)(y+12)
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2 解方程组