若2x+3y-1=y-x-8=x+6,则2x-y=______.
若2x+3y-1=y-x-8=x+6,则2x-y=______.
若3x-4y=0,则x/y=______,(x-y)/y=______,(3x+2y)/(2x+3y)=_____.
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于
若|3x-y-7|+(5x+2y-8)2=0,则x-y=______.
若x+3y=3x+2y=7,则x=______,y=______.
若|x-y+2|与(x+y-1)2互为相反数,则x=______,y=______.
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
若2x-y=8,则6-2x+y=______.
若2x-3y=5,则6-4x+6y=______.
若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
已知2x+3y=5,则6x-4y-2(x-5y)=______.