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A formula

A formula is a relation between two or more variables and a algebraic rule for calculating.

Framing a formula

    A formula can be framed using
  1. given conditions
  2. variables
  3. a relationship mathematical sign

Changing the subject of the formula

Solution of the formula

  1. Change the subject of the formula to the unknown variable
  2. Substitute the values of the given variables
  3. Simplify and obtain the value of the unknown variables