Bob’s account statement showed the previous balance, $6,756.21; interest, $28.15; deposits, $12,350.22, $3,210.57, and $3,209.87; withdrawls, $175.00 and $2,900.00.

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!