Priyanka S. answered • 03/24/15

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David has x amount

Casey has (x-7) amount.

Together they have $97.

Therefore: x + (x+7) = 97

2x - 7 = 97 ....... The main goal is to get x by itself.

So, add 7 to both sides

2x = 104

Divide both sides by 2. Therefore, x = 52.

Since x is the amount of money David has, David has $52. Since Casey has $7 less than David, $52 - $7 = $45

Double check: $52 + $45 = ? Do these numbers add to $97? Yes, they do, therefore, your answer is correct.