A,B, C and D each had some money.?

Me neither lol, I think the question should have been a BIT more clear.

Okay, I'm assuming that "doubled the amounts with the others means" they all start out with a number and then they double the number with each of the others contributing. so just try and follow the math.

A starts with 95 B starts with 95 C starts with 80 D starts with 50

D doubles first so A gives 10 B gives 10 and C gives 30

Now A has 85, B has 85, C has 50, D has 100

for C to double, A gives 10 B gives 30 and D gives 10

Now A has 75 B has 55 C has 100 D has 90

To get B to double

A gives 35, C gives 15, and D gives 5

Now A has 40 B has 110 C has 85 and D has 85

To get A to double,

B gives 30 C gives 5 and D gives 5

Now they all have 80 but C started off with 80 in the first place.

Hope this helps