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x-y=4 equation

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Numerical solution:

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The solution

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x - y = 4
xy=4x - y = 4
Detail solution
Given the linear equation:
x-y = 4

Looking for similar summands in the left part:
x - y = 4

Move the summands with the other variables
from left part to right part, we given:
x=y+4x = y + 4
We get the answer: x = 4 + y
The graph
Rapid solution [src]
x1 = 4 + I*im(y) + re(y)
x1=re(y)+iim(y)+4x_{1} = \operatorname{re}{\left(y\right)} + i \operatorname{im}{\left(y\right)} + 4
x1 = re(y) + i*im(y) + 4
Sum and product of roots [src]
sum
4 + I*im(y) + re(y)
re(y)+iim(y)+4\operatorname{re}{\left(y\right)} + i \operatorname{im}{\left(y\right)} + 4
=
4 + I*im(y) + re(y)
re(y)+iim(y)+4\operatorname{re}{\left(y\right)} + i \operatorname{im}{\left(y\right)} + 4
product
4 + I*im(y) + re(y)
re(y)+iim(y)+4\operatorname{re}{\left(y\right)} + i \operatorname{im}{\left(y\right)} + 4
=
4 + I*im(y) + re(y)
re(y)+iim(y)+4\operatorname{re}{\left(y\right)} + i \operatorname{im}{\left(y\right)} + 4
4 + i*im(y) + re(y)