Question 950401
{{{O=2Y}}}
{{{M=5+Y}}}
{{{O+M+Y=57}}}
Substitute,
{{{2Y+5+Y+Y=57}}}
{{{4Y+5=57}}}
{{{4Y=52}}}
{{{Y=13}}}
Then,
{{{M=5+13}}}
{{{M=18}}}
and
{{{O=2(13)}}}
{{{O=26}}}