Last year it rained on 63 days in mudville. there were 7 times as many days of rain in mudville as in detest hills. how many days did it rain in desert hills last year?

Start by creating a linear equation based on the information given:

63=7x

Now, divide 7 from both sides to get x by itself.

(63/7) = (7/7) x

9=x

Thus, it rained 9 days in desert hills.