SOLUTION: 3.2 + (x + 5.1)= Simplify the expression. Explain each step. Which properties of math did you use. My son originally got 8.3x but it was wrong. Thanks in advance.

Question 840296: 3.2 + (x + 5.1)=
Simplify the expression.
Explain each step.
Which properties of math did you use.
My son originally got 8.3x but it was wrong. Thanks in advance.
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
Correct is 8.3 + x. You are just adding three terms and since addition is commutative and associative, it does not matter what order you add. A more thorough solution:

3.2 + (x + 5.1) = 3.2 + (5.1 + x) (by commutativity)
= (3.2 + 5.1) + x (by associativity)
= 8.3 + x
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