3x-4y=-12 y-3x=9 怎么算
{4/(x+y)+6/(x-y)=3 {9/(x-y)-1/(x+y)=1
5x+4y=22 4x+y=3y+x 怎么解
(y-x)(x-y)^3(y-x)^5怎么算
c语言中x=(x=++y,x+5,x/5) x=3 y=4怎么算
9y=3x-(x-1),4(x+y)-(2x+4)=8y
3y=2x y/3=x/2 12/x=9/y y/x=?y/x=?x/y=?
已知2x-y/x+3y=2,求代数式4x-2y/x+3y减4x+12y除以2x-y
已知2x-y/x+3y=2,求代数式4x-2y/x+3y减4x+12y/2x-y的值
{3(x+y)+3(y+x)=1,3(x+y)+4(y-x)=-1
2x-y=8 3x+2y=5与3x+2y=1 3x-4y=-11用加减法怎么算?
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20
{(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20