若5x=0.8y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=______.
若2x-3y=5,则6-4x+6y=______.
若|y+2|+(x+5)2=0,则x-y=______.
若|3x-y-7|+(5x+2y-8)2=0,则x-y=______.
若3x-4y=0,则x/y=______,(x-y)/y=______,(3x+2y)/(2x+3y)=_____.
若2x+3y-1=y-x-8=x+6,则2x-y=______.
若x2-4x+y2+6y+13=0,则x=______,y=______.
已知x2-4y2=20,x+2y=5,则x=______,y=______.
若|x+3|+(y-2)2=0,则x-2y=______.
若2x-y=8,则6-2x+y=______.
x2-y2=55,x-y=5,则x+y=______.