The value of the variable f as given in the task content is; f = -70.
What is the value of the variable f as given in the task content?
It follows from the task content as indicates above that the equation given in terms of the variable f can be solved as follows;
f/-7 -8 = 2.
f/-7 = 2+ 8
f/-7 = 10
Hence, f = -70.
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