To Find the Number of Units That Gives Break-Even for the Product

Multiple Choice

To find the number of units that gives break-even for the product, solve the equation R $$\mathbf { R } = \mathbf { C }$$ ound your answer to the
nearest whole unit.
-Nadine sold two kinds of tickets to her class play. Student tickets cost $4.00 each, and adult tickets cost $6.50 each. If Nadine sold a total of 37 tickets for $193.00, how many student tickets did she sell?

A) 23 tickets
B) 18 tickets
C) 21 tickets
D) 19 tickets