Rosa can make five professional-grade masks per hour, while Heather can make seven consumer-grade masks per hour. If a professional-grade mask earns Rosa $4 more than Heather receives for a consumer-grade mask, how many dollars should Heather receive for a consumer-grade mask so that her hourly pay is the same as Rosa’s hourly pay? Express your answer to the nearest integer.
+36915 h = heather price for a consumer grade mask
r = rosa price = 4 + h
5(4+h) = 7 h
20 + 5h = 7h
h = 10 dollars per consumer grade mask $ 14 for professional grade mask
