Question

it is known that X + Y = 10

then X + Y + Z = 10 + z . the Euclid axioms that illustrate this statement is

Answer 1

The second axiom, which states that of equals are added to equal then the whole is equal.
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Answer 2

Hello!

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$ANSWER :$

The Euclid's axiom - If equals are added to equals, wholes are equal.

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