You have $85 in your bank account. each week you plan to deposit $7 from your allowance and $25 from your paycheck. the equation bequals85plus(25plus7)w gives the amount b in your account after w weeks. how many weeks from now will you have $275 in your bank account?

number of weeks = 6 weeks

Explanation:
You initially have $85
Each week (w), you will deposit $7 in addition to $25

This means that the equation representing the amount (b) in the account will be:
b = 85 + (7+25) w
b = 85 + 32w 

Now, we want to know in how many weeks will the amount saved be equal to $275. 
To get the number of weeks, we will simply substitute with b = $275 in the above equation and solve for w as follows:
b = 85 + 32w 
275 = 85 + 32w
275 - 85 = 32w
190 = 32w
w = 5.9 which is approximately 6 weeks.

Hope this helps :)