Question: In the last step of the simplification why does {k dt} simplify to {-kt}. I'm very confused where the minus comes from dx/dt = k(75

In the last step of the simplification why does {k dt} simplify to {-kt}. I'm very confused where the minus comes from

dx/dt = k(75 - x)    ➮    dx/(75 -x) = k dt    ➮   ln(75 - x) = -kt

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