Answer:
4 glasses per day
Explanation:
Step 1: State the given
Given that Adela drinks 28 glasses of water per week

Step 2: State what to be determined
To determine how many glasses of water Adela drinks per day

Step 3: State the number of days in a week
There are 7 days in a week

Step 4: Calculate how many glasses of water Adela drinks per day
Knowing fully well that she drinks 28glasses in a week and 7 days make a week. Then,

Divide through by 7

Hence, Adela drinks 4 glasses of water per day