Question

A number when divided by 4 is reduced by 21. Find the number.
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Answer 1

Answer:

Let x be the number.

If a number is divided by the 4 the expression becomes

4

x

If a number, when divided by 4, is reduced by 21, then the equation is

4

x

=x−21

⇒

4

x

−x=−21

⇒

4

x−4x

=−21

⇒−3x=−21×4

⇒x=

3

21

×4=7×4=28

∴,the number is 28

Answer 2

Answer: 28

Explanation:

Lets take the number as x, then

x / 4 = x - 21

x / 4 - x = - 21

( x - 4x ) / 4 = - 21

- 3x = - 21 * 4

- 3x = - 84

3x = 84  

x = 84 / 3

x=28