Afrench class has a total of
39
students. the number of males is
13
more than the number of females. how many males and how many females are in the class?

If the number of males is x and the number of females is y,
x-13=y
x+y=39. Substituting x-13 for y, we have x+x-13=39 and by adding 13 to both sides we get 52=2x and dividing by 2 we get x=26