Question

4+5e ^{-x}=9

Answer 1

first subtract 4 from both sides

Answer 2

then divide both sides by 5

Answer 3

you should get : \[e ^{-x}=1\]

Answer 4

\[\large 4+5e^{-x}=9\]



\[\large 5e^{-x}=9-4\]



\[\large 5e^{-x}=5\]



\[\large e^{-x}=\frac{5}{5}\]



\[\large e^{-x}=1\]



\[\large \frac{1}{e^{x}}=1\]



\[\large 1=1*e^{x}\]



\[\large 1=e^{x}\]



\[\large \ln(1)=x\]



\[\large 0=x\]



\[\large x=0\]