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**dE_logics** To solve non homogeneous differential equations we first have to convert it to homogeneous differential equations (some cases).

So I encountered its problems, or the examples of this type given in my source.

After replacing x + y as u we got the equation -

(2u + 1)du = (3u + 2)dx

In another example (after assuming x + 2y as u)-

(2u + 3)du = (4u + 5)dx

None of the above 2 equations are homogeneous differential equations as claimed in the type's heading, do we have an explanation for this?