The Inverse Property of Addition states that aplus(minusa)equals: The sum of a real number and its additive is, the additive .

The Inverse Property of Addition states that : The sum of a real number and its additive inverse is zero, the additive module.

Step-by-step explanation:

From the Algebra of Real Numbers we know that the Inverse Property of Addition, also know as Existence of Additive Inverse states that for all real number exist only a real number so that:

Where and is also known as additive module.

Therefore, we can complete the phrase below:

The Inverse Property of Addition states that : The sum of a real number and its additive inverse is zero, the additive module.

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

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