Query regarding weight loss

Hey folks,
I want to know if I follow keto diet, then suppose if I have to take 30 grms of carb a day then is it okay if I take more fat like 70-90 grams a day?
Please give me suggestion if I increase fat (like cheese, butter, olive )in my diet and reduce the carb to 30 grams, is still I will loose weight or not?
I take 100-140 gms of protein and that is fixed.

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