How to do this chemistry problem with gases?

HELP!!!!! PLEASE NEED TO GET THIS CHEMISTRY PROBLEM RIGHT!!!!!?

• Question Help Chemistry problem? this is the question: the gases of three identical containers A,B, and C are under pressures of 1.44 atm, 3.16 atm, and 2.52 atm, respectively. these gases are then combined into container D (with a volume of 3.92 L) so that the pressure in Container D is 4.38 atm. Containers A,B, and C have the same volume. Find the volume. please help explain this problem its very important and i really need an answer. i know its Daltons law of Partial pressure but i dont understand it.

• Answer:

  Sum up the pressures of A, B and C: 1.44 atm + 3.16 atm + 2.52 atm = 7.12 atm Use Boyle's Law: P1V1 = P2V2 (7.12) (x) = (4.38) (3.92) x = 2.41146 L (this is the combined volume of A, B and C) 2.41146 L / 3 = 0.804 L (to three sig figs) Nice problem.