a work which could be finished in 11 days was finished 3 days earlier after 10 more men joined . the number of men employed was ?
"x - - - - - - - 11 ( x + 10 ) - - - - 6 x * 11 = ( x + 10 ) 6 x = 12 \ answer : e"
divide(multiply(multiply(3, const_2), 10), subtract(11, multiply(3, const_2)))