In Exercises 6570, name the property used to go from step to step. You only need to name
Chapter 5, Problem 5.1.466(choose chapter or problem)
In Exercises 65-70, name the property used to go from step to step. You only need to name the properties indicated by an a), b), c), or d). For example, in Exercise 65, you need to supply an answer for part a), and an answer to go from the second step of part a) to part b).
a) 2(b + 4) + 1 = \((2 \cdot b+2 \cdot 4)+1\)
= (2b + 8) + 1 b)
b) = 2b + (8 + 1)
= 2b + 9
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