Question

When $5$ is added to a number, we get $15$. How do we represent this in the form of an equation in variable $x$?

• A. $x=15+5$
• B. $x-5=15$
• C. $x+15=5$
• D. $x+5=15$

Answer 1

The correct option is D

$x+5=15$

Let us take the number to be $x$.
When $5$ is added to the number, we get $x+5.$
Now, we know that when $5$ is added to that number, we get $15$.
Hence, $x+5=15$.