SOLUTION: I need to justify each of these step, please help me with this. 5(n+4)+9n= (5n+20)+9n =5n+(20+9n) =5n+(9n+20) =(5n+9n)+20 =(5+9)n+20

Algebra ->  Algebra  -> Expressions -> SOLUTION: I need to justify each of these step, please help me with this. 5(n+4)+9n= (5n+20)+9n =5n+(20+9n) =5n+(9n+20) =(5n+9n)+20 =(5+9)n+20       Log On

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Question 53089: I need to justify each of these step, please help me with this.
5(n+4)+9n= (5n+20)+9n
=5n+(20+9n)
=5n+(9n+20)
=(5n+9n)+20
=(5+9)n+20
=14n+20
Answer by funmath(2873) About Me  (Show Source):
You can put this solution on YOUR website!
The verbage can differ slightly, so check this against your book:
5(n+4)+9n=(5n+20)+9n Distributive Property
=5n+(20+9n) assciative property of addition
=5n+(9n+20) communitative property of addition
=(5n+9n)+20 associative property of addition
=(5+9)n+20 distributive property
=14n+20