- In a given sentence, the variables are replaced by letters and the different operations are replaced by their mathematical symbols. We now arrive at a formula.
- In a given sentence, the variables are replaced by letters and the different operations are replaced by their mathematical symbols. We now arrive at a formula.
- If a formula gives 'x' in terms of the other variables, x is called the subject of the formula.
- When ever a formula is given and we have to make a particular variable as the subject of the formula, we should express that variable in terms of the other variables.
For example in 2x = y + 7k, x is the subject of the formula. If we want to make 'y' as the subject we should change it as y = 2x - 7k.
