x-5+y=10 X=2y 解方程组
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
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+Y/2=3X-2Y=10+6X+Y/4
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 2x+y(y-2x)=9 (x+y)(x+y-3)=10
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2 解方程组
解方程组 {(x+y)/2+(x-y)/3=6 5(x+y)-2(x-y)=4
解方程组 X+Y/2+X-Y/3=6 4[X+Y]-5[X-Y]=2
解方程组 10(x-y)=3(x+y)+15 6(x+y)=4(2x-y)+16
解方程组:{二分之x+y+二分之x-y=6,4(x+y)-5(x-y)=2()