Question

After 12 years Manoj will be 3 times as old as he was 4 years ago. Find his present age.

Answer 1

$$\begin{gathered} \begin{array}{l}\text{Let}\mathit{\text{x}}\text{be the present age of Manoj.}\end{array} \\ \mathrm{According}\mathrm{to}\mathrm{the}\mathrm{question},\mathrm{we}\mathrm{have}: \\ \begin{array}{l}\Rightarrow x+\text{12}=\text{3}(x-\text{4})\\ \Rightarrow x+\text{12}=\text{3}x-\text{12}\\ \Rightarrow \text{2}x=\text{24}\\ \Rightarrow x=\text{12}\\ \therefore \text{Manoj's present age is 12 years}.\end{array} \end{gathered}$$