The first one represents a proportional relationship
If the prices are multiples of 2, then (excluding $0 or free), then the possible prices are such that they add up to $10.
Possible prices are
(2,8),(4,6)
or
$2 and $8, or
$4,$6.
The answer is x=65.
The step by step explanation is on the paper.
The answer is 7.2 because 30% of 24 is 7.2
It looks right, but I could be wrong