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-0,1f+10=9

f= ?

-0,1f + 10=9                                                                                                        -0,1f = 9-10-0,1f =-1    | * (-1)0,1f = 1f = 1 / 0,1f = 10

-0,1f+10=9-0,1f=9-10-0,1f=-1f=10Ответ: f=10