Question

помогите решить!!!!!!!!!!!!!​

Answer 1

13(b+7)/12(b+7)=13/12.

Answer 2

Ответ: $\frac{13}{12}$

$\frac{13b+91}{12b+84}=\frac{13(b+7)}{12(b+7)}=\frac{13}{12}$