01-09-2017
Mathematics

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Maggie's brother is 3years younger than twice her age. The sum of their ages is 24. How old is Maggie?

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01-09-2017

b=bro's age
m=maggie's age

b=-3+2m

m+b=24

subsitute
m-3+2m=24
3m-3=24
add 3 both sides
3m=27
divide by 3
m=9

maggie is 9 year old

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