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## Main Question or Discussion Point

Here is my code

When I run it, it shows the error:

"Solve::nsmet: This system cannot be solved with the methods available to Solve. >>"

How can I solve this equation? Thanks.

Code:

```
Nl = 10^(49) ;
Nh = 100 ;
b = 4*10^(-13) ;
Rs = N[((3 Nl)/(4 Pi b Nh^2))^(1/3)];
a = 6*10^(-18) ;
Solve[x/(4 Pi r^2) E^(-Nh a x) a Nl == (1 - x)^2 b Nh,
x]
```

When I run it, it shows the error:

"Solve::nsmet: This system cannot be solved with the methods available to Solve. >>"

How can I solve this equation? Thanks.

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