Homework Help: math

Posted by Fee on Thursday, August 23, 2012 at 7:30pm.

Samantha smith went into a store and spent half her money and then spent $20 more. Samantha then went into a second store and spent half her remaining money and then spent $20 more. After spending money in the second store, Samantha had no money left. How much money did she have when she went into the first store?

math - PsyDAG, Friday, August 24, 2012 at 2:30pm
Let x = original amount of money.

1/2x - 20 - (1/2)(1/2x-20) - 20 = 0

Solve for x.

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