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## Homework Statement

The problem can be found here: http://alex.fangsoft.net/math.pdf [Broken]

I have completed Task #2, it is Task #1 that I am very lost on. Our teacher has really thrown us head first into the water with this one, I am very unfamiliar with differential equations and their purpose. Our textbook is very unhelpful with a problem of this magnitude.

## Homework Equations

I understand differential equations involve dy/dx = something, then separating the variables, then integrating both sides.

In this case, I would assume dS/dT for salt/time = salt in - salt out, but past that I am very, very lost.

Thank you sincerely in advance.

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