Question

can you give me answer of this plz​

Answer 1

Answer:

Step-by-step explanation:

Subtracting equal values with a common or same no. are equal

Answer 2

Ab + bc=AC(1) and DC+cb=DB-(2)

Cancellation of bc occurs as it's repeating and hence with the combination of eqn 1) and 2) Ab=CD

Euclid's axiom-things which are equal to same things are equal to one another