Baez has 25 marbles. She loses 20% of them one day. Then a friend sees her and gives her double the amount that Baez has after she lost them. How many marbles does Baez end up with?
She loses 5 marbles because 25 x .2 = 
<gadget id="calculator">25*.2</gadget>
<output>5</output>
5.
She has 20 marbles after this because 25 - 5 = 
<gadget id="calculator">25-5</gadget>
<output>20</output>
20.
Her friend gives her 40 marbles because 20 x 2 = 
<gadget id="calculator">20*2</gadget>
<output>40</output>
40.
Adding those marbles to the 20 she had before, she ends up with 40 marbles + 20 marbles = 
<gadget id="calculator">40+20</gadget>
<output>60</output>
60 marbles.

<result>60</result>