Which property is used in the statement? if y = 3 and 3 = 2 + 1, then y = 2 + 1.
transitive property
symmetric property
addition property of equality
subtraction property of equality

The correct answer is "C" (Addition property of equality)

Step-by-step explanation:

1. Are the two expression equal in anyway to each other?

2. When adding a value for example as show in the question "y=3", do both equations still remain equal to one another?

3. When you solve the equation for example as in the equation (change the letter y into a 3), is the answer correct and also equal to the other equation?

If all of these steps are true then your dealing with an Addition Property of Equality(APE).

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step-by-step explanation: