# Algebraic manipulation

## Rearranging formulae 2

Rearranging complicated formulae can be considered the peak of algebra skills. If you manipulate an equation and make your required variable the subject before adding the numeric values, solving for variables becomes easy.

## Rearranging formulae 1

The ability to rearrange formulae or rewrite them is an important skill. There are four main things in rearranging a formula: Add or subtract the same quantity to both sides, and multiply or divide both sides by the same quantity.

## Algebraic indices

An index is used to show how many times a number is multiplied by itself. The plural word for index is indices. If some number is raised to some power, then the power it is raised to is the index of that number.

## Algebraic substitution 1

Substitution is the procedure of putting one thing like a number, a letter or symbol in place of other. In simple words, whenever we use numbers at the position of letters, it is called the substitution process.