At Extramarks Education, An algebraic expression is the combination of variables and constants. An equation is a condition on a variable or variables and it is written with an equal sign. Extramarks provides CBSE Board based question papers. These question papers are available for class 9. Exramarks Education India Pvt. Ltd is providing CBSE solved and unsolved question paper for class 8 students. To know more visit https://www.extramarks.com/ncert-solutions/cbse-class-8/mathematics-linear-equations-in-one-variable