a certain number of men can do a work in 40 days . if there were 5 men less it could be finished in 10 days more . how many men are there ?
"explanation : x * 40 = ( x - 5 ) * 50 5 x - 4 x = 25 x = 25 men answer : option b"
divide(multiply(add(40, 10), 5), 10)