Question

Indicate which property is illustrated in Step 4.




Step 1

4 - 3x - 4 + 4x

=

(4 - 3x) + (-4 + 4x)



Step 2


=

(4 - 3x) + (4x - 4)



Step 3


=

4 + (-3x + 4x) - 4



Step 4


=

4 + (-3 + 4)x - 4



Step 5


=

4 + x - 4



Step 6


=

x + 4 - 4



Step 7


=

x + 0



Step 8


=

x