The answer to your question is 40
Answer:

Step-by-step explanation:


Every hour, the number of liters decreases by 0.5 liter.
lets take
x+y=100 firstly.
then x=100-y equation (i)
Now,
x-y=10
Putting value of x from equation(i)
100-y-y=10
-2y=10-100
-2y=-90
therefore, y=45
Now,
putting value of y in equation(i)
we get
x=100-45
ie x=55
hence, x=55 & y=45
☁️ Answer ☁️
annyeonghaseyo!
The answer is:
B - x = 5
Hope it helps!
Have a nice day hyung/noona!!~  ̄▽ ̄❤️