Hello, thank you for taking the time to post your question!
The key on this type of question is to find a way to relate the variables to one another algebraically based on the information given in the question. On this one we have
L = 2x + 7 since it’s saying that the length is 7 more than twice the width
L * x = 940
From there then I would plug the first equation into the second one and then solve for the value of x algebraically!
(2x + 7) * x = 940
2x^2 + 7x = 940
2x^2 + 7x – 940 = 0
Using the quadratic formula I find the value here to be x = 20 for the width
Meaning that the length is 2(20) + 7 = 40 + 7 = 47
I hope that helps you get moving in a better direction on this type of question! Feel free to reach out if you have any additional questions beyond that :)