1/2 + 3/x = 3/4
3/x = 3/4 - 1/2
3/x = 3/4 - 2/4
3/x = 1/4....this is a proportion, so we cross multiply
(1)(x) = (3)(4)
x = 12
check..
1/2 + 3/12 = 3/4
6/12 + 3/12 = 3/4
9/12 = 3/4
3/4 = 3/4 (correct)
so x = 12
55/4 or 13 3/4
Hope thats right
Answer: 0.06 litre or 60 ml
Step-by-step explanation:
Given: The capacity of glass tank= 26 liter
If he add 20.9 liters of water after 85 marbles to fill it completely, then
The volume of 85 marbles= 
Since, the marbles have same volume.
∴ Volume of each marble= 
⇒ Volume of each marble=
In milliliters, Volume of each marble=
The equation represent the situation is:
First let x be number of small apartment
Since the total apartment is 18
Then number of large apartment is 18 – x
So the equation is:
17,600 = 800x + 1200(18-x)
Simplifying
17,600 = 800x + 21,600 – 1200x
400x = 4000
X = 10