Hi,
1. After 24 hours of sprain put some salt in lukewarm water and give fomentation.
What is meaning of "fomentation"? It means agitating or stirring up trouble. I think the word the writer was thinking of was 'fermentation', which mean agitate or stir up in a physical/chemical sense.
2. Right to vote to all persons of 18 years and above.
Could any body rephrase this sentence in simple way?
Is the sentence given convey same meaning as (2)
All persons of 18 years and above have right to vote. Yes, basically. However, the 'sentence' you are asking about has no verb. You have used the verb 'have'. Many other verbs are also possible, eg
All persons of 18 years and above do not have/ demand / have lost the right to vote.
Best wishes, Clive