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Question
One-fifth of a number is 5 less than that number.
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Solution
Let the number be x.
Then, `1/5`th of the number = `x/5`
Now, `x/5` is 5 less than x
So, the equation formed is `x/5 = x - 5`.
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For riddle answer: substitute the number for the letter it equals
`()/1 ()/2 / ()/3 ()/4 ()/5 ()/6 ()/7 ()/8/()/4 ()/9`
