Answer: Second equation
To solve this, you need to combine like terms. I will use the answer, the second equation, as an example.
1/3x-1/4y-4/5+1/3x-1/4y
Let’s first combine the numbers with x as a variable. These numbers are 1/3 and 1/3.
1/3x-1/4y-4/5-1/4y
2/3x-1/4y-4/5-1/4y
Now we figured out that those combine to 2/3x, which we already know is the same as the original expression. Since the other expressions might also simplify to 2/3x, let’s now combine the numbers with y as a variable
2/3x-1/4y-4/-1/4y
2/3x-2/4y-4/5
-2/4y can be simplified. Let’s do this now by dividing it by 2 and changing it to -1/2y
2/3x-2/4y-4/5
2/3x-1/2y-4/5
The expression simplifies to the same as the original
Hope this helps comment below for more questions :)