Solve for f.

0.3 = 0.5 f - 0.7

 0.3 = 0.5 f - 0.7

+ 0.7            + 0.7

1  =  0.5 f

0.5   0.5

2 = f       ( f = 2 )

f = 2    or     2 = f

step by step solution :

step   1   :

1.1     4 = 22

(4)3 = (22)3 = 26

equation at the end of step   1   :

  ((23) • 26)2

step   2   :

equation at the end of step   2   :

  (23 • 26)2

step   3   :

final result :

  218

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