已知2x+3y=5,则6x-4y-2(x-5y)=______.
已知2x+3y=5,则6x-4y-2(x-5y)=______.
已知x+2y=2,则3x+6y-5=______.
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
已知(x-3)2+|2x-3y+6|=0,则x=______,y=______.
已知x*x+4x+y*y-2y+5=0,则x*x+y*y=?
已知集合M={(x,y)|y=x+3},N={(x,y)|y=-2x+6},则M∩N=______.
已知-x+2y=6,则3(x-2y)2-5(x-2y)+6的值是______.
已知(x-1)2+4|y-6|=0,则5x+6y-4x-8y=______.
已知|2x-3y+4|与(x-2y+5)2互为相反数,则(x-y)2007=______.
已知(3x+2y-5)2与|5x+3y-8|互为相反数,则x=______,y=______.
若2x-3y=5,则6-4x+6y=______.
已知(x+y+2)2+|2x-3y-1|=0,则x+y=______.