CREATE TABLE table_20100 ("Club" TEXT, "Played" TEXT, "Won" TEXT, "Drawn" TEXT, "Lost" TEXT, "Points for" TEXT, "Points against" TEXT, "Points difference" TEXT, "Tries For" TEXT, "Tries Against" TEXT, "Try Bonus" TEXT, "Losing Bonus" TEXT, "Points" TEXT)

How many games won for teams with 49 tries against?
SELECT "Won" FROM table_20100 WHERE "Tries Against" = '49'
SELECT "Won" FROM "table_20100" WHERE "Tries Against" = '49'