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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
$$x + y = 4$$
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:
$$x = 4 - y$$
We get the answer: x = 4 - y
The graph
Sum and product of roots [src]
sum
4 - re(y) - I*im(y)
$$- \operatorname{re}{\left(y\right)} - i \operatorname{im}{\left(y\right)} + 4$$
=
4 - re(y) - I*im(y)
$$- \operatorname{re}{\left(y\right)} - i \operatorname{im}{\left(y\right)} + 4$$
product
4 - re(y) - I*im(y)
$$- \operatorname{re}{\left(y\right)} - i \operatorname{im}{\left(y\right)} + 4$$
=
4 - re(y) - I*im(y)
$$- \operatorname{re}{\left(y\right)} - i \operatorname{im}{\left(y\right)} + 4$$
4 - re(y) - i*im(y)
Rapid solution [src]
x1 = 4 - re(y) - I*im(y)
$$x_{1} = - \operatorname{re}{\left(y\right)} - i \operatorname{im}{\left(y\right)} + 4$$
x1 = -re(y) - i*im(y) + 4