Arianys wants to ride her bicycle 55.5 miles this week. She has already ridden 19 miles. If she rides for 5 more days, which equation could be used to determine, m, the average number of miles she would have to ride to meet her goal?
A: 19m=55.5−519 m is equal to 55 point 5 minus 5

B: 5m=19−55.55 m is equal to 19 minus 55 point 5

C: m=55.5−195m is equal to the fraction with numerator 55 point 5 minus 19 and denominator 5

D: 55.5=19m+555 point 5 is equal to 19 m plus 5