Solo has to read 4 pages from his Science textbook, 20 pages from his Social Studies textbook, 7 pages from his History textbook and 8 pages from his Geography textbook. Solo read 15 pages on Monday. If he has 4  more days to complete all his reading, how many pages does he need to read, on average, in one day?
Solo has to read a total of 4 + 20 + 7 + 8 = 
<gadget id="calculator">4+20+7+8</gadget>
<output>39</output>
39 pages.
After Monday, he had a remainder of 39 - 15 = 
<gadget id="calculator">39-15</gadget>
<output>24</output>
24 pages to read.
To complete his reading, he must read 24/4 = 
<gadget id="calculator">24/4</gadget>
<output>6</output>
6 pages a day.

<result>6</result>