若100x=4,100y=9,则102x+2y=______.
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-y+2|与(x+y-1)2互为相反数,则x=______,y=______.
若2x-3y=5,则6-4x+6y=______.
若2x+3y-1=y-x-8=x+6,则2x-y=______.
已知样本x,99,100,101,y的平均数为100,方差是2,其中x<y,则x=______,y=______.
若(3x-2y+4)2与|4x-y-3|互为相反数,则x=______,y=______.
若x≥0,y≥0,2x+3y≤100,2x+y≤60,则z=6x+4y的最大值是 ______.
若|3x-y-7|+(5x+2y-8)2=0,则x-y=______.
已知2x+3y=5,则6x-4y-2(x-5y)=______.
已知正实数x,y满足xy+2x+y=4,则x+y的最小值为______.
若|x+3|+(y-2)2=0,则x-2y=______.