Match each pair of expressions with the property that can be used to show they are equivalent.
associative
property
distributive
property
additive inverse
property
additive identity
property
linear factor
property
commutative
property
0.9 + 3x + 2.1
and
3x + 2.1 + 0.9
arrowboth
(3x + 2.1) + 0.9
and
3x + (2.1 + 0.9)

3(x + 0.7) + 0.9
and
3x + 2.1 + 0.9