Question

One third of a number is smaller than it's two third by 7 . Find the number

Answer 1

Answer:

the number is 21.

Step-by-step explanation:

Let the number be x.

$one \ third \ of \ the \ number \ =\frac{1}{3} (x) \\\\ One \ third \ of \ a \ number \ is \ smaller \ than \ it's \ two \ third \ by \ 7 \\ => \frac{1}{3} (x) = \frac{2}{3}(x) -7 \\\\ =>\frac{x}{3} = \frac{2x}{3} -7 \\\\=>7=\frac{2x}{3} -\frac{x}{3} \\\\=> 7= \frac{2x-x}{3} \\\\ =>7=\frac{x}{3} \\\\=>x = 7(3) \\\\=>x=21$

Answer 2

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