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Let f(x) and g(x)be functions which take...

Let `f(x) and g(x)`be functions which take integers as arguments. Let `f(x + y) =f(x)+ g(y) + 8` for all intege x and y. Let f(x) = x for all negative integers x and let `g (8) = 17`. Find f(0).

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17
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