Answer: 
<u>Step-by-step explanation:</u>
The equation can be found using the formula:

In the given sequence {7, 13, 19, 25}; a₁ = 7 and d = 13-7 = 6

Add the equations in order to solve for the first variable. Plug this value into the other equations in order to solve for the remaining variables.
(3,-9)
Answer:

Step-by-step explanation:
The steps are not shown. So, I will solve from scratch
Given

Required
Solve, with steps

Apply distributive property


Collect like terms


Divide both sides by 7


Answer:
D
Step-by-step explanation: