I believe that the answer is 328 times 4 = x, where x is the total number of water bottles needed.
The multiplicative inverse of a number x is a number y such that their product xy is 1.
So, we want a number such that

Divide both sides by 10:

<span>Accounting Clerk. ...Auditing Clerk. ...Accounts Receivable Clerk. ...Accounting Assistant. ...Accounts Payable Clerk. ...Bookkeeper. ...Management Trainee. ...<span>Payroll Clerk.</span></span>
4 / (1/4 - 5/2)
4 / (1/4 -10/4)
4 / (-9/4)
4 x (-4/9) = -16/9
Slope is -12 and y-intercept is 3