4x-3y= -5,4y+3x=3;x、y等于几
x+3=5-y,那么x+y等于几
x/4+2等于x,x=多少.y/5等于y-3,Y=多少
4x+5y=105,2x+3y=178,x,y等于
y*y*y*y+2x*x*x*x=4x*x*y 求x等于几,y等于几,写出所有选项!
3x+2y=4y+3z=5z+5x,请问x:y:z等于几比几比几?
若3X=4Y,那么X;Y等于
若3x=4y,则x:y等于
(5x+3y)(3y-5x)-(4x-y)(4y+x)=
(3x-5y)-(3x-2y)等于几
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
|x|=3 |y|=5 |x-y|=|x|+|y| 求 X+Y和 X-Y 等于多少
已知2x^2+3y^2=4x^2y^2+1,x,y为正整数,求x^2+y^2等于几