y²+3x=7,y³+x=3,求y等于几.
y²+3x=7,y³+x=3,求y等于几.
2x-5y=7 2x+3y=1 求x,y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
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+Y=3,XY=2,求X的平方+Y的平方等于几
-x+3y=5 求x和y分别等于几
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于
若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值
已知2x^2+3y^2=4x^2y^2+1,x,y为正整数,求x^2+y^2等于几
x(y-1)-y(x-1)=4求x平方加y平方等于几?