Bob and Johnny have a leaf raking business. They charge $4 for each bag of leaves they rake. On Monday they raked 5 bags of leaves. On Tuesday they raked 3 bags of leaves. On Wednesday, they counted their money and found they had $68 for all three days. How many bags of leaves did they rake on Wednesday?
Combining Monday and Tuesday, they raked 5 + 3 = 
<gadget id="calculator">5+3</gadget>
<output>8</output>
8 bags of leaves.
They earned 8 * $4 = $
<gadget id="calculator">8*4</gadget>
<output>32</output>
32 for the first two days.
O for Wednesday's work they earned $68 - $32 = $
<gadget id="calculator">68-32</gadget>
<output>36</output>
36.
Thus, they raked $36 / $4 = 
<gadget id="calculator">36/4</gadget>
<output>9</output>
9 bags of leaves on Wednesday.

<result>9</result>