How do you solve 5+ 7k = k - 7?

1 Answer
Sep 5, 2017

Answer: k=-2

Explanation:

Solve 5+7k=k-7

First we want to isolate the variable k on one side of the equation by subtracting k and 5 from both sides:
5+7k-k-5=k-7-k-5

We can simplify:
6k=-12

Finally, we divide both sides by 6 to solve for k:
(6k)/6=-12/6

k=-2

Substituting into the original equation to check:
5+7(-2)=(-2)-7

5-14=-9

-9=-9, which is true

Therefore, our answer is k=-2