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 5 days more ?
"760 - - - - 22 760 - - - - 20 x - - - - - 5 x * 5 = 760 * 20 x = 3040 760 - - - - - - - 2280 answer : a"
subtract(divide(multiply(760, subtract(22, const_2)), 5), 760)