Question 1022296
{{{M+K+S=30}}}
{{{M=K+5}}}
{{{K=S+2}}}
Substituting,
{{{K+5+K+S=30}}}
{{{2K+S=25}}}
Substituting again,
{{{2(S+2)+S=25}}}
{{{2S+4+S=25}}}
{{{3S=21}}}
{{{S=7}}}
{{{K=7+2=9}}}
{{{M=9+5=14}}}