Shara borrowed money from her brother 6 months ago. She returned $10 per month to her brother. Currently, she was able to return half of the money she borrowed. How much will she still owe her brother 4 months from now?
For 6 months, Shara was able to return $10 x 6 = $
<gadget id="calculator">10*6</gadget>
<output>60</output>
60 to her brother.
Since she already returned half of the money, then this means she currently owes her brother $
<gadget id="calculator">60</gadget>
<output>60</output>
60.
Four months from now, she will be able to pay an additional $10 x 4 = $
<gadget id="calculator">10*4</gadget>
<output>40</output>
40.
Thus, she will still owe her brother $60 - $40 = $
<gadget id="calculator">60-40</gadget>
<output>20</output>
20 four months from now.

<result>20</result>