Algebra question? help?

Question

seamstreff needs to make 25 dresses by the end of the day. her work day is 8 hours long and she can make 6 dresses in 1.7 hours. If she continues to work at the same rate how long a lunch break can she take and still make all 25 dresses?

Answer 1

6 dresses per 1.7hrs. = 6/1.7

t= time

(6/1.7)t = 25 dresses

t= 25 * (1.7/6)

t= 7.08 hours (to make 25 dresses)

8 hours - 7.08 hours = .92 hour lunch break