Carina has 115 ounces of coffee divided into 5- and 10-ounce packages. If she has 2 more 5-ounce packages than 10-ounce packages, how many 10-ounce packages does she have? Choose the correct choice from the following options:
A) 5	B) 7	C) 6	D) 4	E) 3
Lets say 5 and 10 ounce packages be x and y respectively.   Given that, 5x+10y=115 and x=y+2. What is the value of y.   Substituting the x in first equation, 5y+10+10y=85 -&gt;y=105/15.= 
<gadget id="calculator">105/15.</gadget>
<output>7</output>
7   7
<result>B</result>
Carina has 115 ounces of coffee divided into 5- and 10-ounce packages. If she has 2 more 5-ounce packages than 10-ounce packages, how many 10-ounce packages does she have?