X 3
-- = --
8 7
Cross Multiply
7x = 24
Divide
x = 3.2485...
A
Answer:
She bought 5 calendars.
Step-by-step explanation:
Let Craig bough x calendars.
The cost of 3 calendars is $27.
Hence, the cost of 1 calendar is 27/3 = $9
Now, it has been given that she spent another $18 for more calendars. And we have calculated that cost of 1 calendar is $9.
Hence, in $18 she could buy 2 more calendars.
Therefore, the number of calendars she bought is given by
3 + 2
= 5
She bought 5 calendars
It's kind of like division and mutliplycation I guess