Is it possible to lose more weight when you already lost a lot?

Joming
So in my case. 2 years ago I was 141lbs then I worked out for the first time for like a month and lost 20lbs. I was able to maintain my weight until graduation day, then I started gaining weight again. From 120lbs I am now 134lbs. Now I'm planning to work out again and aiming for 90-100lbs because that's the normal weight for my height. Is it still possible that I will lose more than 30lbs in around 3 months after losing so many weight 2 years ago? With of course daily workout and proper diet though. Just curious because some says that if I lost a lot already. It will be hard for me to lose weight again. Thank You!
Is it possible to lose more weight when you already lost a lot?
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