Question 86253
Interest = (Principal)(rate)(time), or I = Prt [r as a decimal, not a %]
In this case, you have two accountsearning a total of $552 interest between them. So, I + I = 552 ; Prt + Prt = 552. r is given for each account, and presumably t = 1. Let the P for one of the accounts be x and the other P is then 12,000 - x. Plug in each parameter and solve the resulting equation for x.