Solve the equation a-15=25 and state which axiom used here

1.	Solve the equation a-15=25 and state which axiom used here
Answer» Given a-15=25 a-15+15=25+15 (on adding 15 both sides)[Euclid\'s 2nd axiom is used here which states that\xa0if equals are added to equals, then whole are\xa0equals.] a=40

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