Money line bets are wagers placed on a game's outcome. In essence, they are bets on which team or competitor will win any given match. As the wager is on who will win, usually with two teams or competitors, money line bets have only a couple of possible outcomes.
American odds work as if you are bettingR$100, so +100 meansR$100 bet winsR$140. You will get your stake back as well. If you see a -140 that means you are riskingR$140 to winR$100.