Question

Explain how to determine if the two expressions are equivalent using x = 6 and x = 2.

2x + 4 – 1 3 + x + x

Answer 1

If both expressions have the same value after substituting and simplifying for x = 6 and x = 2, then they are equivalent. The value of both expressions is 15 when x = 6. The value of both expressions is 7 when x = 2. So, the expressions are equivalent

Explanation:

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Answer 2

Well, if you substitute 2 and 6 on the first expression, the answer you get when x=2 is half of what you get when x=6

But for the second expression, the answers are not equivalent