Question 549002
i used first letter of their names below
a=b-4
a=9+c
a+b+c=79
c=a-9
solve for b
{{{(b-4)+b+(a-9)=79}}}
{{{(b-4)+b+((b-4)-9)=79}}}
{{{3b-17=79}}}
{{{3b=96}}}
{{{b=32}}}
a=b-4
{{{a=32-4}}}
{{{a=28}}}