若x+5y=4,则3x+15y等于几
x+3=5-y,那么x+y等于几
若3x+5y=3,则4的x次方乘32的y次方等于几,
若3x=4y,则x:y等于
x+x+x=15,x+y+y=19,求y-x等于几
(3x-5y)-(3x-2y)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!
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于
3x+5y=4则8的X次方乘32的Y次方等于几?
方程(3x+1)-(y+z)=x+y,若用含x代数式表示y,则y等于几
3x+2y=4y+3z=5z+5x,请问x:y:z等于几比几比几?
x/4+2等于x,x=多少.y/5等于y-3,Y=多少
若3X=4Y,那么X;Y等于