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 $1,220, what was the total number of pairs of contact lenses that she sold? Pick one:
A) 9	B) 13	C) 15	D) 17	E) 19
(x+5)*150 +x*85=1220   =&gt;x=2   total lens=2+(2+5)= 
<gadget id="calculator">2+(2+5)</gadget>
<output>9</output>
9   9nswer 9
<result>A</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 $1,220, what was the total number of pairs of contact lenses that she sold?