Go to Class 9 RS Aggarwal Chapter-4 Linear Equations in Two Variables Solutions to find answers to questions from the book. There is also a copy of this book on Utopper. Utopper is a very trustworthy place to study and find relevant study materials. All of the important questions that are likely to come up on the tests are answered in this book, and if you keep practising, you will do well on the tests that are coming up. The book can be found on Utopper for free.