Question:নিচের সমীকরণগুলো সমাধান কর:

 z + 3 = 15 

Answer z + 3 - 3 

          = 15 - 3 ; [উভয়পক্ষকে 3 বিয়োগ করে ]

    :. z = 12

    :. সমাধান : z = 12 

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