Question

After 15 years Mona will be 5 times as old as she was five years ago determine her present age​

Answer 1

Step-by-step explanation:

Import linear equations

Let Mona's present age be x

5(x - 5) = x + 15

5x - 25 = x + 15

5x - x = 15 + 25

4x = 40

x = 10

Answer 2

From the data,

After analyzing the data given in the question,

We get to know that,

We have to determine the present age of Mona.

From Question,

It is given that,

After 15 years Mona will be 5 times as old as she was five years ago

So, let us assume that the present age of Mona = $x\:Years$

So, 15 year after her age will be 15 year more as it is today, while 15 year before her age will be 15 year less as it is today.

So, age of Mona after 15 years will be $(x +15)\:years$

So, age of Mona 5 years before will be $(x -5)\:years$

So, from the given condition in the question,

Age of Mona after 15 years after will be 5 times as she was 5 years before.

$(x+15) = 5\times (x-5)\\=>x+15 = 5x-25\\=>5x-x = 25+15\\=>4x = 40\\=>x = \frac{40}{4} = 10$

So, present age of Mona will be 10 years.