Work Step by Step
Subtracting 3 from each side gives, $8/7*d=-4$ Then multiplying both sides by $7/8$ gives $d=-7/2$ Checking gives: $3-4=-1$ which is true.
You can help us out by revising, improving and updating this answer.Update this answer
After 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.