Question 127613
Let x number of men
    y number of women

then x = y+112 (112 more men than women were entered in the race) 
and  x+y=600  (The sum of men and women is 600.)

then y+112+y=600 then 2y+112=600 then 2y=488 then y=244 and x=244+112=356

R: x=356 and y=244