Basic question about differential equation

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SUMMARY

The discussion centers on the differential equation dy/dx + y = x, where x is identified as the independent variable and y as the dependent variable. Participants clarify that in such equations, y is always a function of x due to the nature of the relationship defined by the differential equation. This understanding is typically derived from the context of the problem, where x or t is conventionally used as the independent variable. The notation dy(x)/dx reinforces this relationship, indicating that y is explicitly dependent on x.

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Homework Statement


dy/dx +y=x


Homework Equations



none

The Attempt at a Solution



We know that x is the independent variable because y is differentiate with respect to it. And y is the dependent variable. Just wondering do you guys know why y is always a function of x in these kinds of differential equation? I got confuse when somebody write like dy(x)/dx+y(x)=x. How do you know y is always a function of x?

Thank you
 
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It's usually understood what the independent variable is in a given differential equation from the context; often it's either x or t when dealing with one independent variable.
 

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