A:6x+6(x-2000)=150000
B:6x+6(x+2000)=150000
C:6x+6(x-2000)=15
D:6x+6(x+2000)=15
My grandmother lives in the west,____ ____ the train station.
四个小朋友玩跷跷板,他们的体重分别为P,Q,R,S,如图所示,则他们的体重大小关系是( )