There are 6 people in Jacob’s family. Jacob’s sister is 5 years younger than he is. He has twin brothers who are 3 years older than he is. His mom is 3 times Jacob’s age, and his dad is 4 years older than his mom. The total of all the ages of all his family members is 165 years. How old is Jacob? Define a variable, write an equation, and solve the problem.

Jacob is years old.

Step-by-step explanation:

Let the age of Jacob be years.

Jacob’s sister is years younger than he is.

So, the age of Jacob's sister be years.

Jacob's twin brothers are years older than he is.

So, the age of each of the twin brother be years.

Jacob's mom is times his age.

So, the age of Jacob's mom be years.

Jacob's dad is years older than his mom.

So, the age of Jacob's dad be years.

Now, the total of all the ages of all his family members is years.

So,

Hence, Jacob is years old.

true

step-by-step explanation: