已知x-3y=3,则7+6y-2x=______.
已知2x+3y=5,则6x-4y-2(x-5y)=______.
已知(x-3)2+|2x-3y+6|=0,则x=______,y=______.
已知x+2y=2,则3x+6y-5=______.
已知x+y=3,则7-2x-2y的值为______.
已知集合M={(x,y)|y=x+3},N={(x,y)|y=-2x+6},则M∩N=______.
已知2x+3y=-1,且5x-6y=10,则x=______.
已知(x+y+2)2+|2x-3y-1|=0,则x+y=______.
已知|x-3|+|y+1|=0,则3x-2y=______.
已知|x-3|+(y+2)2=0,则x+y=______.
若x+3y=3x+2y=7,则x=______,y=______.
若3x-4y=0,则x/y=______,(x-y)/y=______,(3x+2y)/(2x+3y)=_____.
已知2x+3y=-8 4x+y=66 则(x-y)^2-(3x+2y)^2的值为______