Yes you would but there's a chance you could end up in ER with malnutrition as you aren't betting enough vitamins, nutrients and other proteins/carbs that are gained from other things such as vegetables, fruit, fish or certain red meats.
I agree with the others. You would probably lose weight but is it entirely healthy to just eat soup and salad all the time. In my research, I learned the best way to lose weight is the combination of diet and exercise. Try researching a plan or program that best suits you.
I depends on what type of diet do you eat and the composition within the salad if its still healthy for you. If the dietary intake amount will be meet.
Just know if you do that you will lose weight but you will harm your metabolism. When you go back to eating normally you will gain all the weight back. So why not weight lift or bike and eat a little healthier!?