化简x+{3y-[2y-(2x-3y)]}=______.
计算:(2x-3y)2-(2x+3y)(2x-3y)=______.
已知(x+y+2)2+|2x-3y-1|=0,则x+y=______.
已知2x+3y=5,则6x-4y-2(x-5y)=______.
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x+3y=3x+2y=7,则x=______,y=______.
若|x+3|+(y-2)2=0,则x-2y=______.
已知|x-3|+(y+2)2=0,则x+y=______.
已知集合M={(x,y)|y=x+3},N={(x,y)|y=-2x+6},则M∩N=______.
已知(x-3)2+|2x-3y+6|=0,则x=______,y=______.
若2x+3y-1=y-x-8=x+6,则2x-y=______.
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方