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A Number is Doubled and 9 is Added. If the Resultant is Trebled, It Becomes 75. What is that Number?

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Explanation

  • A number is doubled and 9 is added.
  • Resultant is trebled, it becomes 75.

The number can be figure out as:

Let suppose the number is y.

Now, number “y” is double and 9 is added

2y + 9

Resultant (2y + 9) is trebled

3(2y + 9) = 75 ________ (i)

Value of y can be find out easily from equation (i) by just simplifying it (y = 8).

To Find

Number = ?

Solution

Let suppose

Number = y

According to the given condition

3(2y + 9) = 75

2y + 9 = 25

2y = 25 – 9

2y = 16

y = 8

Required Number = 8 answer

Conclusion

A number is doubled and 9 is added. If the resultant is trebled, it becomes 75. The required number is 8.

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