Jack says that the solution to 8.5-a=5 is that a equal 13.5 because addition and subtraction are inverse operations and 8.5 + 5=13.5. Does jack solution make sense? Explain how do u know wether or not jack solution makes sense without solving

Question

Mathematics

Peyton Proctor

2 March, 15:36

Jack says that the solution to 8.5-a=5 is that a equal 13.5 because addition and subtraction are inverse operations and 8.5 + 5=13.5. Does jack solution make sense? Explain how do u know wether or not jack solution makes sense without solving

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Answers (1)

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Evan Gilmore · Answer 1

No. Jack's solution doesn't make sense.

Step-by-step explanation:

It is given that, 8.5 - a = 5

Jack is saying that addition and subtraction are the reverse operations. Yes it's true, but here,

8.5 - a = 5

If we move 5 to the opposite side, it becomes - 5, and - a to the other side, it becomes a.

So, 8.5 - 5 = 3.5 and not 13.5.

Overall, Jack's solution doesn't make sense.