At first, the ratio of dave's savings to sam's savings was 5: 4. after each of them donated $40 to charity, the ratio of dave's savings to sam's savings became 13: 10. what was dave's savings at first?

Let the initial savings at first be = x

Given ratio is and after donating $40 to charity, the ratio becomes

Hence, the relation becomes:

=

or

So , Dave's saving at first was 5x = 5*60 = $300

and Sam's saving at first was 4x = 4*60= $240

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