L=(P-2W)/2 HOPE I HELPED YA :)
Answer: 6.125 or 6¹/₈ units of water
Step-by-step explanation:
There are 7 people in the family and each of them are mean to drink 7/8ths of water.
The amount of water all 7 should take is therefore:
= 7 * 7/8
= 49/8
= 6.125 or 6¹/₈ units of water