Respuesta :

Answer:

6 glasses of water

Step-by-step explanation:

This is fairly simple as we already have the equation

x+y=10 ---> x=10-y

8x+12y=96

now substitute

80 -8y  + 12y = 96

4y= 16

y=4

if y = 4

x+4=10

x=6

Mark drank 6 glasses of water