Sorry for my English, is not my first language..

I have some trouble in terms of using integrate function in R.
fx is a function of m and x where m is supposed to be a unknown parameter.

>fx=function(m,x){
+ x*2/(3*m)*(1-x/(3*m))
+ }

The problem is in upper bound, it depends on parameter m.

>integrate(fx,lower=0,upper=3*m)$value

Is it possible to use the integrate function when bounds depend on a
parameter?

How to define m to solve this integral? The result should be m.

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