4/(x+y)+6/(x-y)=3,9/(x-y)-1/(x+y)=1 解这个方程组
4/(x+y)+6/(x-y)=3,9/(x-y)-1/(x+y)=1 解这个方程组
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:4(x+1)=3(y+3) x-2y=7y-6x/3
解方程组(三分之x+y)+y=6,3(x+y)-y=24
不解方程组x+4y=6 x-3y=1求代数式7y(x-3y)的平方-2(3y-x)的立方
解方程组 (1){2x-y=5,x-2y=1 (2){7x+3y=5,-5x+6y=-9
利用图像解方程组:(1) {2y-x=-6 {y+3x=4
方程组{x/4+y/3=1 5(x-8=6(y+9)
解方程组(1) 2(x-y)/3=x+y/4-1 6(x+y)=4(2x-y)+16
解方程组{4/x+y+6/x-y=3, 9/x-y-1/x+y=1
解方程组:{4/x+y+6/x-y=3 9/x-y-1/x+y=1}
10/x+y+3/x-y=-5 15/x+y-2/x-y=-1(用换元法解此方程组)