The value of a variable is not fixed. It can take any value. Any letter can be used aa a variable.
E.g. Let’s say that there are 50 mangoes in one box and there are ‘n’ number of boxes. The total number of mangoes will be 50xn= 50n.
RULES FROM GEOMETRY
- Perimeter of a square:
Let l= length of a side. Perimeter= 4xl= 4l
- Perimeter of a rectangle:
Let l= length, b=breadth. Perimeter= 2x(l+b)
RULES FROM ARITHMETIC
- Commutative property:
- Distributive property:
An equation is a condition expressed using variables
There are two sides in an equation- LHS and RHS, having an equal (=) sign between them.