Aljebra : Tofauti kati ya masahihisho

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Mstari 1:
'''Aljebra''' ni tawi la [[hisabati]] linalotumia ishara kutatua matatizo ya [[hisabati]], kwa mfano kupiga hesabu hata kama namba fulani ndani yake haijulikani.
 
* Mfano mmoja, ni [[mlinganyo]] ufuatao ambapo <math>x \,\!</math> ni kutofautiana:
:<math>\quad \frac{7x + 9}{4x + 2} = 2 \,</math>
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