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Algebra
Last updated at August 14, 2026 by Teachoo
Class 7 (Ganita Prakash 1, 2)
Chapter 4 Class 7 - Expressions using Letter-Numbers (Ganita Prakash)
Transcript
Algebra Suppose we want to solve β β 3 = 5 We have to find the missing number In algebra, We donβt write boxes We write letters, like π₯ π₯ β 3 = 5 It has a variable β x But, why write π₯? Why not boxes ? Writing x is easier to write than β if there are two boxes, now do you tell which box is which ? Variables are also called letter-numbers in this chapter What are algebraic expressions? Expression does not have an = sign 9 β 8 is an expression 2x + 3 is an expression 3x β 9 is an expression 4x +5 = 10 is not an expression 4x +5 = 10 has an = Sign So, it is not an expression, It is an equation In this chapter, we will study algebraic expressions, and equations
