# If the first and third terms equal to 14 and the second and fourth terms equal to 30, what is d?

##### 2 Answers

#### Explanation:

Write a systems of equations, with respect to

However, when we look at the first equation, we realize a system wasn't necessary. The d's cancel out to give the following:

Substituting into the second equation:

Hopefully this helps!

#### Explanation:

Although it is not mentioned, as questioner has mentioned

Let the numbers be

Subtracting first from second equation, we get

Hence series is