If you are given an algebraic formula and asked to make one variable the subject – e.g. make ‘x’ the subject – then you are asked to rewrite the formula so that one side has the variable and the other side has all of the other terms.
Here are a few examples ranging from simple to more complex ones.
Example 1 – Simple case of making x the subject
Example 2 – Expand brackets before changing the subject of the formula
Example 3 – Variable is in both sides of the formula
Example 4 – Variable is in the denominator
Example 5 – Variable is in both the numerator and the denominator