How many mL of water at 10°C (2 significant figures) must be added to 75 mL of water at...

How many mL of water at 10°C (2 significant figures) must be added to 75 mL of water at 35°C to obtain a final temperature of 19°C? (Make the same assumptions as in Question 9.)

Reference Question 9:

When 225 mL of H₂O at 25°C are mixed with 85 mL of water at 89°C, what is the final temperature? (Assume that no heat is lost to the surroundings;