4-2 Properties of Equality

Front

What is the Addition Property of Equality?

Back

If you add the same number to both sides of an equation, the two sides remain equal.

Front

What is the Subtraction Property of Equality?

Back

If you subtract the same number from both sides of an equation, the two sides remain equal.

Front

What is the Multiplication Property of Equality?

Back

If you multiply both sides of an equation by the same number, the two sides remain equal.

Front

What is the Division Property of Equality?

Back

If you divide both sides of an equation by the same non-zero number, the two sides remain equal.

Front

If 10 + d = 25, what is d?

Back

d = 15.

Front

If α + Γ = ξ, how do you isolate α?

Back

Subtract Γ from both sides: α = ξ - Γ.

Front

If you divide one side of an equation by 4, what must you do to the other side?

Back

Divide the other side by 4.

Front

If you multiply one side of an equation by 4, what must you do to the other side?

Back

Multiply the other side by 4.

Front

What happens if you add a number to only one side of an equation?

Back

The equation becomes unbalanced.

Front

What is an example of using the Subtraction Property of Equality?

Back

If 25 + d = 36, then 25 + d - 25 = 36 - 25.