Answer:
53
Step-by-step explanation:
i had to use this old method (pic related).
Answer:

Step-by-step explanation:
remaining cups = total cups - used caps
let remaining cups be = x
total cups = y = 8
used cups = z= 
Hence x = y-z
x = 8 - 
=
-
=
=
= 
x= 
Remaining cups = 