Simplify a/(a-b)+b/(b-a)

Math
Factor out of .
Factor out of .
Factor out of .
Simplify the expression.
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Move a negative from the denominator of to the numerator.
Reorder terms.
Combine the numerators over the common denominator.
Cancel the common factor of .
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Cancel the common factor.
Divide by .
Simplify a/(a-b)+b/(b-a)

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