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## Explanation

- If doubling a number and adding 20 to the result.

- Gives the same answer.

- As multiplying the number by 8 and taking away 4 from the product

The number can be figure out in this way.

Let suppose the number is y.

Doubling the “y” and adding 20 to the result

2y + 20 ________ (i)

Multiplying the “y” by 8 and taking away 4 from the product

8y – 4 ________ (ii)

We can figure out the value of y easily by considering both equations (i) and (ii) equal (y = 4).

## To Find

Number = ?

## Solution

Let suppose

Number = y

According to the given condition

2y + 20 = 8y – 4

20 + 4 = 8y – 2y

6y = 24

y = 24/6

y = 4

**Required Number = 4 answer**

## Conclusion

If doubling a number and adding 20 to the result gives the same answer as multiplying the number by 8 and taking away 4 from the product, the number is 4.