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Q: Which property of equality justifies the statement If y plus 7 equals 9 then y equals 2?

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It is the property that equals plus equals are equals.

Reflexive property

It is the reflexive property of equality. Any quantity is equal to itself.

There is no property that justifies it. The equation is true for some values of x, not for others.

Reflexive

It is the additive property of equality, as the additive property of length, as applied to adjacent or parallel line segments.

That is the commutative property of equality.

Equals multiplied by equals are equal.

Reflexive.

It is the REFLEXIVE property of equality.It is the REFLEXIVE property of equality.It is the REFLEXIVE property of equality.It is the REFLEXIVE property of equality.

The subtraction of equality.

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The commutative property.

The multiplicative property of equality. Multiply each side by -1/3.

The Transitive Property of Equality.

symmetric property of equality

That's the reflexive property of equality.

Reflexivity of equality.

Reflexive Property of Equality. And if BC is congruent to CB it's the Reflexive Property of Congruence.

Addition Property of Equality (APOE)

That is not a formula, it is the transitive property of equality.

Equals divided by non-zero equals are equal.

It is called the commutative property, a + b = b + a

The statement is an equality, and it's true.