Question

number of boys
After 15 years, Mary's age will be four times of her present age. Find her present
ono runee and fifty naise coins. It contains 3​

Answer 1

Answer:

Present Age Of Mary Is 5 Years.

Step-by-step explanation:

Let Present age be x

After 15 Years Mary's age will be x+15

So

4x = x + 15

=> 4x - x = 15

=> 3x = 15

=> x = 15/3

=> x = 5 years

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Answer 2

Answer:

Mary is 5 years old now.

Explanation:

Let her present age be $x$

$4x = x + 15\\\\4x - x = 15\\\\3x = 15\\\\x = \frac{15}{3}\\\\x = 5$