Hattie rewrote the equation as shown:

9n + 7 − 2n = 4(-n + 5) − 3n
9n + 7 − 2n = -4n + 20 − 3n

Which property did she use to rewrite the equation?

A.
addition property of equality
B.
distributive property
C.
multiplication property of equality
D.
substitution property