You can write the equation y=x+4 in different ways.

Which of these is correct ?
x+y=4
x=4+y
y-x=4
y+4=x
x=y-4
There could be a couple of ways ... Please help I do not have a clue on this. I will be very greatful if you could help in the next 30 mins xxxx

why don't you pick values for x and y which work in the original equation.
eg. let x=5, then y=9

now test to see in which of the equation are true.

or else, simply see if the rules of equations have been followed to change the original.

To determine which equation is correct, you can substitute values for x and y and check if the resulting equation holds true.

Let's use the given equation y = x + 4.

First, we'll pick values for x and y that work in the original equation:
Let's choose x = 5, then y = 9 (as mentioned in your example).

Now, substitute these values into each of the provided equations and see if they are true:

1. x + y = 4:
Plugging in x = 5 and y = 9, we get 5 + 9 = 4, which is false.
Therefore, x + y = 4 is not correct.

2. x = 4 + y:
Plugging in x = 5 and y = 9, we get 5 = 4 + 9, which is false.
Thus, x = 4 + y is not correct.

3. y - x = 4:
Plugging in x = 5 and y = 9, we get 9 - 5 = 4, which is true.
Therefore, y - x = 4 is correct.

4. y + 4 = x:
Plugging in x = 5 and y = 9, we get 9 + 4 = 5, which is false.
Hence, y + 4 = x is not correct.

5. x = y - 4:
Plugging in x = 5 and y = 9, we get 5 = 9 - 4, which is true.
Therefore, x = y - 4 is correct.

Based on these tests, the correct equations are:
- y - x = 4
- x = y - 4

I hope this helps! Let me know if you have any further questions.