Can you add variables with different exponents

Janet is mixing a 15% glucose solution with a 35% glucose solution. this mixture produces 35 liters of a 19% glucose solution. how many liters of the 15% solution is januet using in the mixture? a. 25 liters c. 28 liters b. 7 liters d. 10 liters

2x + 1 < 5 solve the following inequality. then place the correct number in the box provided.

With alll of except for the 2 that i did already