解方程组:1)2x+y=2 2)3x-2y=10 x= ,y =
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:(0.2x+0.1y)/2- (4x-y)/10=(x-y)/5+ (3x+0.5y)/30 (3x+2y-1
解方程组:(x+3)(y-2)=(x-3)(y+10),(x+1)(y+3)=(x-2)(y+12)
解方程组X+Y/2=3X-2Y=10+6X+Y/4
解方程组{ 3x-4y(x-y)=3 { 2x-3y=1
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
解方程组(1)2x+3y=12 ,2x+y=0 (2)x+y=7,3(x+y)-7y=7
解方程组(1)2x-3y=10,-4x+y=5 (2)3x-2y=15,5x-4y=23
解方程组 2x+y(y-2x)=9 (x+y)(x+y-3)=10
数学书解方程组{2(x+y)-(x-y)=3,(x+y)-2(x-y)=1
解方程组:2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16
解方程组{(x-2)(y+3)=(x+1)(y-1) {(x+1)(y+1)=(x-1)(y+5)