Steve bought a total of 6 packages of pens, and each package contained either 3 or 7 pens. If exactly 4 of the packages Steve bought contained 7 pens, how many pens did Steve buy?	Choose one:	A) 17	B) 21	C) 34	D) 42	E) 56
Explanation:   If Steve bought 4 packages of 7 pens and 6 packages total, then he must have purchased 2 packages of 3 pens.   4(7) + 2(3) = 28 + 6= 
<gadget id="calculator">28 + 6</gadget>
<output>34</output>
34   Answer : (34).
<result>C</result>
Steve bought a total of 6 packages of pens, and each package contained either 3 or 7 pens. If exactly 4 of the packages Steve bought contained 7 pens, how many pens did Steve buy?