Answer
k = -3
Work Step by Step
5k +7 = 2(6k - 14) + 56
5k +7 = 12k - 28 + 56
5k = 12k - 28 + 56 - 7
5k - 12k = -28 + 56 - 7
-7k = -28 + 56 - 7
-7k = 21
k = -3
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.