2a= a+b-(b-a)=7525-903=6622
=> a = 6622/2=3311
=> b=7525-3311=4214
=> a/b=3311/4214=11/14
cho ps a/b có a+b=7525 va b-a=903
a, hay xac dinh ps do roi rut gon
b, neu them 42 vao mau so cua ps toi gian thi can them bao nhieu vao tu so cua ps toi gian
cho ps a/b có a+b=7525 va b-a=903
a, hay xac dinh ps do roi rut gon
b, neu them 42 vao mau so cua ps toi gian thi can them bao nhieu vao tu so cua ps toi gian