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Which property is not used to simplify the following expression?

(x+2)⋅5−7=5(x+2)−7

=(5x+10)−7

=5x+(10−7)

=5x+3

 

 

 

commutative property of multiplication

commutative property of addition

associative property of addition

distributive property

Guest Dec 6, 2017

Best Answer 

 #1
avatar+7339 
+1

(x + 2)⋅5 − 7

 

=  5(x + 2) − 7       by the commutative property of multiplication

 

=  (5x + 10) − 7       by the distributive property

 

=  5x + (10 − 7)       by the associative property of addition

 

=  5x + 3       just because  10 - 7 = 3

 

So the commutative property of addition is not used.

hectictar  Dec 7, 2017
 #1
avatar+7339 
+1
Best Answer

(x + 2)⋅5 − 7

 

=  5(x + 2) − 7       by the commutative property of multiplication

 

=  (5x + 10) − 7       by the distributive property

 

=  5x + (10 − 7)       by the associative property of addition

 

=  5x + 3       just because  10 - 7 = 3

 

So the commutative property of addition is not used.

hectictar  Dec 7, 2017

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