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E.g.1) 42 x 23 = (22)2 x 23 = 24 x 23 = 27

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E.g.2) 9x = 27

          9x = 33

          (32)x = 33

          32x = 33

 Hence 2x = 3

          x = 2/3

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E.g.3) 3x x 22x-3 = 18

 

3x x 22x-3 = 32 x 21

          x = 2

 

          3x x 22x-3 = 32 x 21

          2x -3 = 1

          2x = 4

          x = 2

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