Question 1058379
{{{M=F-8}}}
{{{F=9+B}}}
{{{M+F+B=300}}}
Substituting,
{{{F-8+F+(F-9)=300}}}
{{{3F=317}}}
{{{F=317/3}}}
Check your problem setup.
All solutions should be integers and the first one is a fraction.
Correct and repost.