### simplify rational expression

Hi

W10,SageMath 9.2

I wanted to answer this question, but I realized that myself, I was not able to answer it ! ;-(

how to simplify eq below ?

```
var('a,b,c,d',domain='real')
assume (d!=0)
eq=(a+b)/(c*d)==3/d
print(eq)
print (eq.simplify())
print(eq.simplify_full())
print(eq.simplify_rational())
print(eq.simplify_rational())
```