若x-2y=3,则2x-4y-7=______.
若3x-4y=0,则x/y=______,(x-y)/y=______,(3x+2y)/(2x+3y)=_____.
若x+3y=3x+2y=7,则x=______,y=______.
若|3x-y-7|+(5x+2y-8)2=0,则x-y=______.
若2x-3y=5,则6-4x+6y=______.
若2x+3y-1=y-x-8=x+6,则2x-y=______.
若(3x-2y+4)2与|4x-y-3|互为相反数,则x=______,y=______.
已知2x+3y=5,则6x-4y-2(x-5y)=______.
若|x-y+2|与(x+y-1)2互为相反数,则x=______,y=______.
若4x-3y-6z=0,x+2y-7z=0(xyz≠0),则x:y:z=______.
若|x+3|+(y-2)2=0,则x-2y=______.
已知x+y=3,则7-2x-2y的值为______.
若|x-3|与|2y+3|互为相反数,则x+y=______.