已知|2x-4|+|4y+3|=0,则x-2y=_________.
已知2x+5y-3=0,则4^x×32^y的值为_________.
已知x-2y=-3,则15-3x+6y=_________.
已知3X-2Y=0,且X-1大于y,则X的取值范围为_________.
1.已知x^2-4y^2=0,则分式(x^2-xy+y^2)/(x^2+xy+y^2)的值为_________.
二元一次方程已知(3x-2y+1)²与4x-3y-3互为相反数,则x=_________,y=________
已知x*x+4x+y*y-2y+5=0,则x*x+y*y=?
已知2log3[(x—y) / 2]=log3(xy),则x / y=_________.
设实数x,y满足x^2+4y^2+2x-47+2=0,则x^2y+2x的值等于_________
已知3x^2+xy-2y^2=0,求{(x+y)/(x-y)+4xy/(y^2-x^2)}/{(x+3y)*(x-y)}
已知x,y为实数,根号3x+4 +y^2-6Y+9=0则x+y=?
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
已知x-2y/2x+3y=3/4,则x:y=