It is important to have a good and well-planned study routine. Focus more time on weak subjects while also concentrating on the subjects you are good at.
Timely execution is important to achieve your goal. If any portion of the schedule is incomplete, ensure to complete it immediately the following day.
First, complete studying the basics, and later focus on completing all the NCERT books and in-text questions.
2x - (24 - x) = -6
2x - 24 + x = -6
3x - 24 = -6
x = 16
3x = 18
Revision is very important. It must be done regularly to obtain clarity on any topic in any subject.
Practice makes you perfect. Practice previous year's question papers and sample papers, which aid you in identifying your shortcomings.
Another important aspect of scoring good marks is time management to become quicker at solving questions.
Make sure to take breaks between studies and practise yoga or meditation to relax your mind.