# Question #49a45

Mar 13, 2017

See the entire solution process below:

#### Explanation:

First, let's call "a number": $n$.

Then "three times a number" can be written as:

$\left(3 \times n\right)$ or $\left(3 \cdot n\right)$ or $3 n$ - we will use $3 n$

One more than this can be written as:

$3 n + 1$

This sum "is seven" so we can write:

$3 n + 1 = 7$