Question

a)abcd.81=33abcd

b)abcabc+abc=321642

c)abab+ab=2550

Answer 1

Ta có:

abcd.81=33abcd

=> abcd.80+abcd=330000+abcd

=> abcd.80=330000=> abcd=330000:80= (mấy tự tính nha)

b, abcabc+abc=321642=> abc.1002=321642=> abc=321642:1002=( mấy tự tính)=321

c, abab+ab=2550

=> ab.102=2550

=> ab=2550:102=25

Answer 2

a)abcd x81=33abcd

  abcd x81=330000+abcd

  abcd x81-abcd=330000

  abcd x 80=330000

=>abcd=330000:80=4125