Question

\(\ \Huge \ln{5-2x} = -3? \)

Answer 1

Isolate x?

Subtract both sides by ln 5 then divide both sides by -2.

Assume that -2x is not a part of natural logarithm.

Answer 2

If you mean ln (5 - 2x) = -3, then convert it into exponent form.
\[\Large e^{-3} = 5 - 2x\] Then isolate x.