The properties that justify each line is:
- Line 1 to Line 2: Associative property of multiplication
- Line 2 to Line 3: Associative property of multiplication
The expressions are given as:
[tex]c(bd)[/tex]
[tex](cb)d[/tex]
[tex](bc)d[/tex]
Notice that only the positioning of the variables are changed, the operator within the variables remain the same (i.e. the multiplication)
Hence, the properties that justify the three lines is the associative property of multiplication
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