Answer in book:
Notes:I've always had a mundane problem with negatives and fractions, when I cancel out the negs in the last step, must I also switch the signs of the proceeding variables as well?
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Your second to last step is correct. What you are doing when you "cancel out" the negatives is multiplying the fraction by . So you get . Then use the distributive property to arrive at the correct answer (the one in your book).
which matches your answer:
case closed, thank you both
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