Problem: each week , harry is paid x dollars per hour for the first 30 hours and 1.5 x dollars for each additional hour worked that week . each week , annie is paid x dollars per hour for the first 40 hours and 2 x dollars for each additional hour worked that week . last week annie worked a total of 53 hours . if harry and annie were paid the same amount last week , how many hours did harry work last week ?
Rationale: "annie earned 40 x + 13 ( 2 x ) = 66 x let h be the number of hours that harry worked . harry earned 30 x + 1.5 x ( h - 30 ) = 66 x ( 1.5 x ) ( h ) = 81 x h = 54 hours the answer is d ."
annotated_formula: add(divide(subtract(add(40, 2), 30), 1.5), 30)