Chelsea buys 8 packs of markers each pack contains the same number of makers Chelsea gives 10 markers to her brother then she has 54 markers left how many markers were in each pack

First, see how many she had in all(before she gave some to her brother):
54 + 10 = 64

Then, divide to get how many were in each package:
64/8 = 8

There were 8 markers in each package.

Hope this helps!!
~Kiwi