Rational Number are set of numbers that can be written as a/b where a and b are integers, but b is not equal to 0; an integer or a fraction; for example: 6 can be expressed as 6/1 and 0.5 can be expressed as 1/2.
No, John is incorrect.
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Correct work shown:</h3>








The correct answer should be x = 7 or x = -1
The answer is 5/9. I showed a bit more work on the other post