during a period of x weeks, there were 13 days when it didn't rain. on how many days did it rain?
in x weeks there are 7 x days
so
7 x - 13
Please work it out
7x -13
In 1 week=7 days
X weeks= 7x days
Number of days it rained is 13
Number of days it didn't rain = 7x - 13
To determine the number of days it rained during the x-week period, we first need to know the total number of days in x weeks.
To find the total number of days in x weeks, we multiply the number of weeks (x) by 7 (the number of days in a week): total number of days = x * 7.
Now, since there were 13 days when it didn't rain, we can subtract this from the total number of days to find how many days it rained: days it rained = total number of days - number of days it didn't rain.
Therefore, the calculation to find the number of days it rained during the x-week period is:
days it rained = (x * 7) - 13.