California wine is 9% alcohol. French wine is 5% alcohol. How many gallons of each do you need to make 200 gallons of 7% alcohol. I know the answer is 100 gallons each, but I need the equation.

Scott’s bank account showed a balance of $750 on sunday. during the next five days, he made one deposit of $140 and numerous withdrawals of $180 each. let x represent the number of withdrawals that scott made. write an inequality that can be used to find the maximum number of withdrawals that scott could have made and maintain a balance of at least $100. do not use a dollar sign ($) in your response.