hieu so tuoi hai anh em la : [20-16]:2=2 [tuoi]
tuoi anh la : [20+2]:2=11[tuoi]
tuoi em la : 11-2=9
dap so : anh : 11 tuoi
em : 9 tuoi
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số tuổi của em khi tuổi anh=em
16:2=8(tuổi)
số tuổi của anh là
(20-16)+8=12(tuổi)
đáp số : tuổi anh:12 tuổi
tuổi em:8 tuổi
k cho mình nha