Marty's class collected $10.00 in a school-wide penny collection contest. If Tommy's class subtracted $4.00 from the amount they collected, x, and then multiplied the difference by 2, they would have the same amount of money as Marty's class.
How much money did Tommy's class collect?
A.
$9.00
B.
$13.00
C.
$4.00
D.
$17.00