It is 450 liters in 2 days
Answer: 36.67 grams of water is added.
Step-by-step explanation:
Let the amount of water is added be 'x'.
Amount of sugar = 5 g
We need to make 12% of sugar syrup.
x grams of water is added to 5 g of sugar, to 12% of sugar syrup.
so, it becomes,

Hence, 36.67 grams of water is added.
C+3c is 4c and -4+9 is 5 so your answer is 4c+5