Answer:
13.02 kilograms
Step-by-step explanation:
we know that Two boxes of books have a total mass of 35.1 kilograms
we also know that one of the boxes has a mass of 22.08 kilograms
and let be the other box mass be x
so
22.08 + x = 35.1
transpose to find the mass of other box
x = 35.1 - 22.08
x = 13.02
we can now even recheck
22.08 + 13.02
= 35.1