{9y-5x=35 4y+7x=34 x,y分别等于几
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=5-y,那么x+y等于几
-x+3y=5 求x和y分别等于几
x(y-1)-y(x-1)=4求x平方加y平方等于几?
x+x+x=15,x+y+y=19,求y-x等于几
xy+x-y=18,x,y各等于几
2X+8Y=17,3X+5Y=7,X和Y,等于几?
2x-5y=7 2x+3y=1 求x,y等于几
x方+y方-2x-4y+5=0 求(x-y)的1999次方等于几?
6X-Y=18 = Y-4X=22,X等于几,Y等于几
y²+3x=7,y³+x=3,求y等于几.
X加Y=320 X等于Y加Y加Y X和Y各等于几