Answer:
The answer is 1/5
Step-by-step explanation:
First, you make it into 1 fraction by making the denorminator same:
1/x + 1/3x = 5
(3+1)/3x = 5
4/3x = 5
It is given that we need to find the valus of 3x/4. We can see that the previous working, 4/3x=5 is almost similar to the question so you can flip upside down the working to make it into 3x/4:
4/3x = 5
3x/4 = 1/5
OR
You can use 1 to divide both side to make it more understandable:
4/3x = 5
1 ÷ (4/3x) = 1 ÷ 5
3x/4 = 1/5
