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A French 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?
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A French 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?
asked
Feb 21, 2018
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A French 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?
Mathematics
middle-school
Biduleohm
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Biduleohm
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3
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f=number of females
m=number of males
total is 39
m+f=39
males is 13 more than females
m=13+f
subbsitute 13+f for m
m+f=39
13+f+f=39
13+2f=39
minus 13 both sides
2f=26
divide both sides by 2
f=13
13 females
m=13+f
m=13+13
m=26
13 females and 26 males
Sudheer Singh
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Feb 22, 2018
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Sudheer Singh
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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
RobertoT
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Feb 25, 2018
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RobertoT
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