Question

One tenth of a number is two less than one seventh of its predecessor. Find the number.
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Answer 1

Step-by-step explanation:

To Find : The number

Solution :

Let The number = n

So, One-tenth of number n =  × n

Now,

The predecessor of number n = n - 1

So, One-seventh of number ( n -1 ) =  × ( n - 1 )

According to question

one tenth of a number =  1 seventh of its predecessor - 2

i.e   =  - 2

Solving this equation

or,    

By cross multiplication

 7 n = 10 ( n - 15 )

i.e number = n = 50

Hence, The number  is 50