Решите уравнения 1                            4
_____      +   ____________       = -1
lg (9x - 8)      lg (9x - 8) + lg 0,001 


4                            6
_________     +   ___________  = -5
lg (3x - 5) + 2      lg (3x - 5) - 3


6                          6
_________      -   ____________   = 5
lg (x + 7) + 2       lg (x + 7) - 3
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