a work which could be finished in 12 days was finished 3 days earlier after 10 more men joined . the number of men employed was ?
x - - - - - - - 12 ( x + 10 ) - - - - 6 x * 12 = ( x + 10 ) 6 x = 10 \ answer : e
divide(multiply(multiply(3, const_2), 10), subtract(12, multiply(3, const_2)))