2X+8Y=17,3X+5Y=7,X和Y,等于几?
2X+8Y=17,3X+5Y=7,X和Y,等于几?
x+3=5-y,那么x+y等于几
2x-5y=7 2x+3y=1 求x,y等于几
|x|=3 |y|=5 |x-y|=|x|+|y| 求 X+Y和 X-Y 等于多少
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)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-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+3y=5 求x和y分别等于几
x-y/3=x+y/2 2x-5y=7等于多少
x,y满足-5|x-2y|+8|y-1\2|=0则x和y等于多少
y²+3x=7,y³+x=3,求y等于几.