Question

Tim so co 2 chu so biet ghep them so 3 vao dau va cuoi so do ta duoc 1 so gap 87 lan so da cho. 

Help me!!!

Answer 1

goi hai so can tim la ab

theo bai ra ta co:

3ab3=ab.87

3000+a.100+b.10+3=(a10+b).87

3003=a870+b87-a100-b10

3003=a770+b77

3003=77(a10+b)

3003=77.ab

ab=3003:77

ab=39

Answer 2

Pn làm đúng rồi

Answer 3

Goi so can tim la ab. Khi them so 3 vao dang truoc va cuoi  thi ta duoc so moi co dang la 3ab3. Ta co:

3ab3=ab. 87

3000+ab.10+3= ab. 87

3000+3=ab.77

3003=ab.77

ab=3003:77

ab= 39

Vay so can tim la 39

Answer 4

Bai m lam co dung k cac ban

Answer 5

Xin cac bn cho m xin y kien