A mother's age is $19$ years more than the sum of the ages of her two sons. $5$ years ago, the mother's age was $4$ times than the sum of the ages of her two sons. What is the age of the older child?
Let's say the sum of the ages of her sons is $x$, the mother's age will be $x+19$. $5$ years ago, $x-5$ = $x+19-5$. However, I believe that I've gone too wrong.
What kind of methods can I use to solve this question?
I'll be waiting for your professional helps.
My Kindest Regards!