x+y=100 x-20=3(y-20)怎解
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
x+y=100 x-20=3(y-20)怎解
x+y=20-6 3x+y=30
x+y=20 3x=y
1/(x+y)-1/(x+y)=3/20 2/(x+y)+3/(x-y)=19/20 这是
3(x+y)+2(x-y)=20 0.3x+0.6y=60 x=?y=?
已知:x-y=1,x+y=-7,求代数式3(x+y)+20(x-y)-5的值
X=5 y=-20 If not x>0 then x=y-3 else y=x+3 print x-y;y-x end
|x|+|y|=30 2|x|-3|y|=20 求x,y
x=5 y=-20 IFx<0 THEN x=y-3 ELSE y=y+3 END IF PRINT x-y;y-x E