a , b and c have rs . 500 between them , a and c together have rs . 200 and b and c rs . 330 . how much does c have ?
"a + b + c = 500 a + c = 200 b + c = 330 - - - - - - - - - - - - - - a + b + 2 c = 530 a + b + c = 500 - - - - - - - - - - - - - - - - c = 30 answer : c"
subtract(add(200, 330), 500)