根据3（x+y)-2(x-y)=11,4(x+y)+3(x-y)=9可得出x+y= ,x-y=

根据3（x+y)-2(x-y)=11,4(x+y)+3(x-y)=9可得出x+y= ,x-y= 3(x+y)-2(x-y)=11 4(x+y)+3(x-y)=9 4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11 3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27 根据x=3y填表 x=3 x=?x=18 x=?x=90 x=?x=?y=?y=2 y=?y=4 y=?y=12 y=2.5不对！是x=3 y=？x=？y=2 x=18 y=4，x=？y=4，x=90 y=？x=？y= 12，x=？y=2. (x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)= (x+y)(x+2y)(x+3y)(x+4y)=-40y的值为根号11 根据下列条件 求x:y的值 (1)x:(x+y)=3:2 (2)(x-y):y=11:3 根据x=y分之8,填空 x=1 x=2 x=3 x=4 y= y= y= y= x和y成什么比例?为什么? 如果3x=2-4y,那么y=--------（用含x的式子表示y）,根据----------------------. input x input y print x/2 print 3*y x=x+1 y=y-1 print x print y end 根据程序画出程序框图. 2（x+y)-3(x-y)=3 ,4(x+y)+3(x-y)=15 {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20 {(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20 4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6 3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2 （x+y）/2- x-y/2=6 3(x+y)=4(x-y)