An optometrist charges $150 per pair for soft contact lenses and $85 per pair for hard contact lenses. Last week she sold 5 more pairs of soft lenses than hard lenses. If her total sales for pairs of contact lenses last week were $2,160, what was the total number of pairs of contact lenses that she sold?	Pick
A) 11 B) 13 C) 15 D) 17 E) 19
(x+5)*150 +x*85=2160   =&gt;x=6   total lens=6+(6+5)= 
<gadget id="calculator">6+(6+5)</gadget>
<output>17</output>
17   Answer 17
<result>D</result>
An optometrist charges $150 per pair for soft contact lenses and $85 per pair for hard contact lenses. Last week she sold 5 more pairs of soft lenses than hard lenses. If her total sales for pairs of contact lenses last week were $2,160, what was the total number of pairs of contact lenses that she sold?