Answer:
Transitive property of equality
Step-by-step explanation:
Let A be any non empty set and R is any subset of the Cartesian product A × A. Then, R is a relation on A.
The relation R is said to be a transitive relation if (a, b) ∈ R, (b, c) ∈ R, then (a, c) ∈ R.
It is given that ABC = DEF and DEF = XYZ, then ABC = XYZ.
This shows the transitive property of equality.
Answer:
<h2>x = 1</h2>
Step-by-step explanation:

Yeah but what is the question?
Answer: He does not have enough money
The pants are initially $40
1/4 of this is $10
40-10 = 30 is the discount price
Mr Jacobs is short $5 (since 30-25 = 5)