CPM Homework Help : AC Problem 6-29

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6-29.

As Sachiko solved the equation $(x+2)+3=9$ , she showed her work in the table below. Copy the table and provide justification for each step.

Statement	Reason
$(x+2)+3=9$	Given
$x+(2+3)=9$
$x+5=9$
$x+5−5=9−5$
$x=4$

Hint:

Decide what rule goes with each step being made.

Example:

Statement	Reason
$(x+2)+3=9$	Given
$x+(2+3)=9$	Associative Property
$x+5=9$
$x+5−5=9−5$
$x=4$

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