Question

1. An expression which involves both ____ and ____ is called an algebraic expression
2. if 2× + 3 = 9 , then value of x is ____
3. cost of 1 notebook is Rs x , then cost of 15 note book is ____
4. expression for one less then thrice of n is ___
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Answer 1

1. Integer constants, variables.

2. x=3

3. 15x

4. 1-3n