6AB-41AB=0=>41AB-6AB=0=>AB.(41-6)=0
AB.35=0=>AB=0
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Tim AB, biet rang 6AB-AB×41=0
tim ab biet rang :
A, ab x b = bab
B, a x b x ab = bbb
C, ab x aba = abab x aa = aaaa
doan duong AB ngan hon doan duong CD =2km . Tim chieu dai moi hinh doan duong do , biet rang chieu dai cua doan duong AB =3/4 chieu dai cua doan duong CD
tim 2 so co tong = 469 biet rang eu xoa chu so 7 cua so lon thi duoc so be giai bang cach ab co duoc khong
Thay a,b bang chu so thich hop de duoc bieu thuc co gia tri bang 0
6ab - ab * 41 = 0
a) Tim ab biet 2ab * 3 =ab5 ( co gach ngang tren dau nhe )
b) Tim 1 so tu nhien co 3 chu so, biet rang neu chuyen chu so 8 tan cung cua so do len dau thi duoc 1 so gap 3 lan so cu va them 22 don vi
Giup mink giai mik cho 3 tick
Tim 1 so co 2 cs, biet rang neu viet them cs so 0 vao giua 2 so cus so do ta duoc so moi gap 7 lan so phai tim
tim so co hai chu so biet rang neu viet them chu so 0 xen vao giua hai chu so cua so do ta duoc so moi gap 66 lan so can tim.
tong la 352 biet rang neu them mot so 0 vao ben phai so be thid uoc so lon .tim ca hai so do?