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2015-10-14T22:06:51+08:00

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14 :) 1/2 of 14 is 7. So, if you add 14 + 7, the answer will be 21.
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can you pls add the checking pls
n-1/2n = 21
thank you
  • Brainly User
2015-10-16T11:38:31+08:00

This Is a Certified Answer

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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

x + x/2 = 21

LDC: 2

(2)x + (2)(x/2) = (2) (21)
2x + x = 42
3x = 42
3x/x = 42/3

x = 14

The number is
14.

To check:
x + x/2 = 21

14 + 14/2 = 21
14 + 7 = 21
21 = 21
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