The problem
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How did you get a positive Y
Answer provided by our tutors
We are using 'Multiplication Property of Equality':
If two expressions are equal to each other and you multiply both sides by the same number, the resulting expressions will also be equivalent.
That is, for all real numbers a, b, and c the following statement is true:
If a = b, then a • c = b • c (or ab = ac).
Now, lets get back to your equation.
We have:
Multiply both sides by (-1):
The result is:
