5x=3y,x比y小15,x,y各等于几
x+3=5-y,那么x+y等于几
x+x+x=15,x+y+y=19,求y-x等于几
3x+2y=4y+3z=5z+5x,请问x:y:z等于几比几比几?
x比y等于4比7 x+50比y+50等于3比5 x,y各是多少
xy+x-y=18,x,y各等于几
(3x-5y)-(3x-2y)等于几
X加Y=320 X等于Y加Y加Y X和Y各等于几
X与Y是无理数,X+Y=2,X,Y各等于几?
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!
|x|=3 |y|=5 |x-y|=|x|+|y| 求 X+Y和 X-Y 等于多少
x比y等于3比4,30+x比50+y等于5比7,求x和y
2X+8Y=17,3X+5Y=7,X和Y,等于几?