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For real numbers a and b when is the equation a plus b equals a-b true?
Idkidk123
a + b = a - b
Subtract a from each side:
+ b = - b
The only way that 'b' can equal its own negative is if b=0.
So (a + b) can equal (a - b) only if b=0.
(It doesn't matter what 'a' is.)
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∙ 14y ago
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