Question

Frame an equation for the statement: "A number is four times another number and their difference is 12".

Answer 1

$\text{Let the number be}x.$
$\text{The other number is four times}x,\text{that is}4x.$

$\text{Difference between them is 12:}\Rightarrow (4x-x)=12$

$\text{Hence, the required equation is}4x-x=12.$