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From Karnataka Open Educational Resources
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'''Bindu Thirumalai IT for Change '''  You have said that let a=x in step 1. Therefore this step 2(a-x)= a-x divide both sides by a-x is not possible because a-x = 0 and you cannot divide by zero, its undefined.
 
'''Bindu Thirumalai IT for Change '''  You have said that let a=x in step 1. Therefore this step 2(a-x)= a-x divide both sides by a-x is not possible because a-x = 0 and you cannot divide by zero, its undefined.
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'''Sriranjani Ranganathan, IT for Change''' Yes, this is the fallacy. Rules of cancellation and algebraic manipulation do not hold when zero is involved...
    
= Which day is Pi Day ? =  
 
= Which day is Pi Day ? =  
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