a can do a piece of work in 12 days . when he had worked for 2 days b joins him . if the complete work was finished in 8 days . in how many days b alone can finish the work ?
8 / 12 + 6 / x = 1 x = 18 days answer : a
subtract(inverse(subtract(multiply(divide(const_1, 8), subtract(const_1, multiply(2, divide(const_1, 12)))), divide(const_1, 12))), add(12, 8))