I like mine better - you wasted some brackets :-}
>How about
>

>nValue = 150-((nFinalValue-1)/2.71)
>

>
>Agnes
>>

>>LOCAL nFinalValue,;
>>nvalue
>>
>>nValue = 10
>>
>>
>>  m.nFinalValue = 1 + (( 150 - m.nValue ) * 2.71 )  &&& gives 380.4
>>
>>*-- Now i must Find nvalue 
>>nValue = ? ( to find 10 )
>>
>>

>>
>>Thank in advance
>>
>>
>>bernhart