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; for f = 2, h = -1
; for z = -1, n = 5
; for t = 1, f = -4
; for z = 4, t = -1
; for 
from the form:
from the form:
from the form:
a solution to the equation:
is a solution to the equation 
?
:
:
:
:
:
:
:
at 
.
at 
.
is given. Calculate for which value of the variable 
, for which 
applies.
