Melody

It sounds like a typo to me, just a little error. I don't think that it would mean anything but would you like to give us an example of one such comma? 

Yes, what did you want us to do with it?  There is no equal sign or anything.  

$$1:1.9\;\rightarrow 10:19$$

Rosala, your answer is incorrect!   shock!  Horror!  

what fantastic presentation Ninja  

yes, add 2/3 to both sides first and the multiply both sides by 4/3

You are better to keep it in fractions.  

Well, are you going to give us a hint?  

Yes we can only hope :)

Come on Dragon, at least spend a little time thinking about what i just wrote.  

Sorry Aziz I didn't realize that you had just posted something very similar. lol 

I gues Dragon felt a little overwelmed.

rain on second day  + (rain on first day) = 11.9 inches

BUT rain on fist day was just 5.4inches less then on the second day so

rain on second day  + (rain on second day - 5.4inches) = 11.9 inches

Just to make it easier to write down Chris called the rain on second day x

so

x+(x-5.3)=11.9 inches

do you understand this so far Dragon?