Question

The difference of a number and 12 is three. Find the number.

Short answer

The number is 15.

Step-by-step solution

Step 1. Given information

The difference of a number and 12 is three.

Step 2. Forming linear equation

Let the number be $x.$

Then,$x-12=3$

Step 3. Solving the equation

$$\begin{gathered} x-12=3 \\ x=3+12 \\ x=15 \end{gathered}$$