Question 279281
Sewer #1=a
Sewer #2=b
sewer #3=c
{{{a=b-2}}}
{{{b=c-5}}}
{{{a+b+c=56}}}
use substitution and salve for c
{{{a+b+c=56}}}
{{{(b-2)+(c-5)+c=56}}}
{{{((c-5)-2)+(c-5)+c=56}}}
{{{3c-12=56}}}
{{{3c=68}}}
{{{c=68/3}}}=22.66
{{{b=(68/3)-5}}}
{{{b=(68/3)-15/3}}}
{{{b=53/3}}}=17.66
{{{a=b-2}}}
{{{a=(53/3)-2}}}
{{{a=(53/3)-6/3}}}
{{{a=47/3}}}=15.66 id say 15 rats as there arent partial rats in a sewer