John buys koolaid for 12$ at a local store. If he bought it at the wholesale store he would get an extra liter of koolaid for the same cost. Also, the koolaid is 1$ cheaper per liter at the wholesale store. What is the price per liter of the koolaid at the local store?  Select:	A) 3	B) 4	C) 5	D) 6	E) 7
12/(x+1) = 12/x -1   12/( +1)= 
<gadget id="calculator">12/( +1)</gadget>
<output>12</output>
12/x -1=&gt;x = -4 or 3   =&gt; x = 3 as price cannot be negative.   =&gt; price per liter at local store = 12/3= 
<gadget id="calculator">12/3</gadget>
<output>4</output>
4   Answer 4.
<result>B</result>
John buys koolaid for 12$ at a local store. If he bought it at the wholesale store he would get an extra liter of koolaid for the same cost. Also, the koolaid is 1$ cheaper per liter at the wholesale store. What is the price per liter of the koolaid at the local store?