Answer:
x= 9
Step-by-step explanation:
good luck
Answer:
14 students
Step-by-step explanation:
Given
Let:
read a book
watched TV
So, we have:
-- total



Required
Students that did both (x)
This is calculated using:

So, we have:

This gives:

Open brackets


Collect like terms


<em>Hence, 14 students did both</em>
100×16.60=1,660
Sam cost
1,660+1,660×0.06=1,759.6