Question

which property of equality can be used to justify this step?

Answer 1

Answer:

C. Addition Property of Equality

Step-by-step explanation:

Addition Property of Equality allows one to add the same quantity to both sides of an equation.

Answer 2

Answer:

Addition Property of Equality

Step-by-step explanation:

15-10x = 6x

We are adding 10x to each side, which we can do by the addition property of equality.

Addition Property of Equality

If a=b

then  a+c = b+c