4x-2y=7,3x+2y=10解方程组
解方程组X+Y/2=3X-2Y=10+6X+Y/4
解方程组 10(x-y)=3(x+y)+15 6(x+y)=4(2x-y)+16
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
解方程组x+y/3=x-y/4 2x+3y=11
解方程组:(0.2x+0.1y)/2- (4x-y)/10=(x-y)/5+ (3x+0.5y)/30 (3x+2y-1
已知方程组{3x+4y=10 4x+3y=-2,不解方程组则x+y=
解方程组:(x+3)(y-2)=(x-3)(y+10),(x+1)(y+3)=(x-2)(y+12)
解方程组:2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16
解方程组 2x+y(y-2x)=9 (x+y)(x+y-3)=10
解二元一次方程组:{5(x+y)+3(x-y)=2{7(x+y)-3(x-y)=-6
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2 解方程组