Question

5. Indicate which property is illustrated in Step 3.

https://media.studyisland.com/cgi-bin/mimetex.cgi?\begin{array}{lcrcl}\text{Step\;1}%20&\;&%202x\;+\;6\;+\;2x\;-\;4%20&=&%20(2x\;+\;6)\;+\;(2x\;-\;4)\\\vspace*{9\hspace{-20}}\\\text{Step\;2}%20&\;&%20&=&%202x\;+\;(6\;+\;2x)\;-\;4%20\\\vspace*{9\hspace{-20}}\\\text{Step\;3}%20&\;&%20&=&%202x\;+\;(2x\;+\;6)\;-\;4\\\vspace*{9\hspace{-20}}\\\text{Step\;4}%20&\;&%20&=&%20(2x\;+\;2x)\;+\;(6\;-\;4)\\\vspace*{9\hspace{-20}}\\\text{Step\;5}%20&\;&%20&=&%20(2\;+\;2)x\;+\;(6\;-\;4)\\\vspac

associative
distributive
commutative
arithmetic fact