Problem: a began business with rs . 45000 and was joined afterwards by b with rs . 5400 . when did b join if the profits at the end of the year were divided in the ratio of 2 : 1 ?
Rationale: "45 * 12 : 54 * x = 2 : 1 x = 5 12 - 5 = 7 . answer : a"
annotated_formula: subtract(multiply(const_4, const_3), divide(divide(multiply(45000, multiply(const_4, const_3)), 5400), 2))