CREATE TABLE table_4723 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What was the home team score when the score for the away team was 7.9 (51)?
SELECT "Home team score" FROM table_4723 WHERE "Away team score" = '7.9 (51)'
SELECT "Home team score" FROM "table_4723" WHERE "Away team score" = '7.9 (51)'