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Simplify: 2-a/(a+b)
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= ( 2(a+b) - a )/(a+b) = ( 2a + 2b - a )/(a+b) = (a + 2b)/(a+b)
2-a/(a+b) 2(a+b) a =----- - ------- (a+b) (a+b) 2a + 2b -a = ------------- (a+b) a+2b = -------- a+b
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