there is food for 760 men for 22 days . how many more men should join after two days so that the same food may last for 16 days more ?
"760 - - - - 22 760 - - - - 20 x - - - - - 16 x * 16 = 760 * 20 x = 950 760 - - - - - - - 190 answer : e"
subtract(divide(multiply(760, subtract(22, const_2)), 16), 760)