# Half of a certain number added to its one - third gives 15. Find the number

2
by ayeshaoct

2015-04-15T22:02:33+05:30

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Basically we need to setup an equation that models the situation and solve it.
Let

Half of  is   and one third of   is  .
Add up and set them equal to :

write the fractions using a common denominator :

combine like terms :

multiply each side by , the reciprocal of   :

simplify :

haha ty!
2015-04-16T01:36:26+05:30

### This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Let the number be  X.
half of the number = X / 2
one third of the number = X / 3

so the number is 18.
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verify again:      half of 18 = 9
one third of 18  = 6
add them to get 15.      so it verifies  ok.