If the first and third terms equal to 14 and the second and fourth terms equal to 30, what is d?
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!
Although it is not mentioned, as questioner has mentioned
Let the numbers be
Subtracting first from second equation, we get
Hence series is