SOLUTION: how do you justify each step of this problem (12+8x)+13

Question 892808: how do you justify each step of this problem (12+8x)+13
Answer by AnlytcPhil(1806) (Show Source): You can put this solution on YOUR website!



Use the commutative principle of addition to interchange the 12 and the 8x



Use the associative principle of addition to move the parentheses from around
the first two terms to around the last two terms:



Now we can add the 12+13 and get 25 instead of (12+13)



That's it.

Edwin

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