## Answer for Day 4 Problem

## @chrisrice is 35 years old and @jancharlest is 22 years old (at present). 🎯

Let x be the present age of @jancharlest **in years**. Since @chrisrice is 13 years older than @jancharlest, let (x + 13) be the age of @chrisrice.

When we look at 9 years ago, the age of @jancharlest was (x - 9) and the age of @chrisrice was (x + 13 - 9) or simply (x + 4). Since it was stated in the original problem that 9 years ago, the age of @chrisrice was twice the age of @jancharlest, our equation can be worded into: "The age of @chrisrice plus 4 is equal to 2 times the age of @jancharlest after deducting 9 from it", or simply (x + 4) = 2 * (x - 9).

Present | Past (9 years ago) | |
---|---|---|

@jancharlest | x | x - 9 |

@chrisrice | x + 13 | x + 4 |

(x + 4) = 2 * (x - 9)

x + 4 = 2x - 18

x - 2x = -18 - 4

-x = -22

x = 22

Since we represented the present age of @jancharlest as *x* years old, and the value of x is 22, his age **in years** is 22. Since @chrisrice is 13 years older than @jancharlest, the age of @chrisrice **in years** is (22 + 13) or simply 35.

## Winner: @jfang003 🏅

1 HIVE has been sent to @jfang003's account as reward. 💰 @jfang003 also won yesterday! 🤓

Mentions: @holovision and @ahmadmanga (@ahmadmangazap)

Special mentions: @chrisrice and @jancharlest 😆

RE: Day 4 Problem of my Math mini-contest for D.Buzz 😎