We need to find how many weeks you will have $205 in the bank account, which means that we already know b, but in this case, we have b as a function of w, then we just need to solve for w in the equation:

We can do it like this:
1. solve the sum 10+6 inside the parentheses

2.subtract 95 on both sides of the equation:

3.Divide both sides by 16:

Now, that we have an equation to calculate w, we just have to replace b which is $205, the total amount of money that is in the bank account.

Then, we need 7 weeks to save $205 in the bank account