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 $1,925, what was the total number of pairs of contact lenses that she sold?
Select:
A) 11	B) 13	C) 15	D) 17	E) 19
(x+5)*150 +x*85=1925   =&gt;x=5   total lens=5+(5+5)= 
<gadget id="calculator">5+(5+5)</gadget>
<output>15</output>
15   Answer 15
<result>C</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 $1,925, what was the total number of pairs of contact lenses that she sold?