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Algebra
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OpenStudy (ceejayy):
Is -7+9=-9+7 true, false or open?
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OpenStudy (mhchen):
You can check your work by evaluating both sides. What is -7 + 9? What is 7 - 9? Are they the same answers?
OpenStudy (vuriffy):
(-7+9) = 2. (-9+7) = -2. Order matters.
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