An optometrist charges $150 per pair for soft contact lenses and $85 per pair for hard contact lenses. Last week she

Source: Official Guide

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 $1,690, what was the total number of pairs of contact lenses that she sold?

A. 11
B. 13
C. 15
D. 17
E. 19

The OA is B

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