Question 345774
1.{{{K+D=96}}}
2.{{{D+M=93}}}
3.{{{K+M=81}}}
Subtract eq. 3 from eq. 1,
{{{K+D-K-M=96-81}}}
{{{D-M=15}}}
Add that to eq. 2,
{{{D-M+D+M=15+93}}}
{{{2D=108}}}
{{{highlight( D=54)}}}
Then from eq. 1,
{{{K+54=96}}}
{{{highlight(K=42)}}}
From eq. 3,
{{{42+M=81}}}
{{{highlight(M=39)}}}