The perimeter of a triangle is 34 meter. the sides measure 16 meters, 8 meaters, and x meters. what is the value of x?

What are the excluded values? m+5/mn+3m

I’m really confused and need to learn this

Problem 3 a bank charges a service fee of $7.50 per month for a checking account. a bank account has $85.00. if no money is deposited or withdrawn except the service charge, how many months until the account balance is negative