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The quantity is not a quantified system of equations and inequalities

(*Axialsimmetric Problems) I write the physics laws,There is shaft mounted with rim for interference with a flywheel. The three costant C1,C3,C4 I find them by imposing the boundary conditions: I don't know because Mathematica give me this error,that i've published in the picture. I try the solution exact of the three costant C1,C3,C4....... Thank you and good day!!!

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POSTED BY: Giovanni Ferdina
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The picture

Attachments:
POSTED BY: Giovanni Ferdina
Attachments:
POSTED BY: Giovanni Ferdina

Consider this example:

 Solve[0.1 (x == 5), x]

This gives the same error message. This is because 0.1 (x == 5) isn't syntatically correct. You can't multiply an equation by a number.

POSTED BY: Sean Clarke
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