I thought of a number, subtracted it from 6 1/4 , multiplied the difference by 1 2/3 and then by 2 4/5 . The result was the same as the result of division of 146 by 5 3/14 . What was my number?

Respuesta :

Answer:

Number was [tex]\frac{1}{4}[/tex]

Step-by-step explanation:

Let the number was x.

As per statement of the question,

Subtracted from [tex]6\frac{1}{4}[/tex]

⇒ [tex]6\frac{1}{4}[/tex] - x

⇒ [tex]\frac{25}{4}-x[/tex]

Difference was multiplied by [tex]1\frac{2}{3}[/tex]

= [tex](\frac{25}{4}-x)\times (1\frac{2}{3})[/tex]

= [tex](\frac{25}{4}-x)\times (\frac{5}{3})[/tex]

Then again multiplied by [tex]2\frac{4}{5}[/tex] Or [tex]\frac{14}{5}[/tex]

= [tex](\frac{25}{4}-x)\times (\frac{5}{3})\times (\frac{14}{5})[/tex]

= [tex](\frac{25}{4}-x)\times (\frac{14}{3})[/tex]

This result was same as the result of division of 146 by [tex]5\frac{3}{14}[/tex]

= [tex]\frac{146}{\frac{73}{14}}[/tex]

= [tex]\frac{146\times 14}{73}[/tex]

= 28

Now [tex](\frac{25}{4}-x)\times (\frac{14}{3})[/tex] = 28

[tex](\frac{25}{4}-x)=(\frac{3\times 28}{14})[/tex]

[tex](\frac{25}{4}-x)=6[/tex]

x = [tex]\frac{25}{4}-6[/tex]

  = [tex]\frac{25-24}{4}[/tex]

  = [tex]\frac{1}{4}[/tex]

  = [tex]\frac{1}{4}[/tex]