Respuesta :
There are many possibilities so I am going to give 3 answers
777113
777131
777311
Answer:
The number can be many numbers like: 7,777,111 or 7,555,333 or 7,111,777
A: 7,777,111
We have four 7's and three 1's
[tex]7*4=28[/tex]
[tex]1*3=3[/tex]
[tex]28+3=31[/tex]
B: 7,555,333
We have one 7, three 5's and three 3's.
[tex]5*3=15[/tex]
[tex]3*3=9[/tex]
[tex]15+9+7=31[/tex]
These also can be 7,333,555 or 7,111,777.