simplifly variable expressions

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  1. Simplifly variable Expressions

    I need help on justify each step. 5(n+4)+9n=(5+20)+9n =5n+(20+9n) =5n+(9n+20) =(5n+9n)+20 =(5+9)n+20 =14n+20 PLease and Thank-You 5(n+4)+9n =(5n+20)+9n distribution =5n+(20+9n) addition =5n+(9n+20) addition =(5n+9n)+20 addition =(5+9)n+20 factoring =14n+20

    asked by Bowier4 on September 20, 2006