Solve for k
k = \frac{\sqrt{210} - 8}{2} \approx 3.245688373
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-2k=-\sqrt{210}+8
Add 8 to both sides.
-2k=8-\sqrt{210}
The equation is in standard form.
\frac{-2k}{-2}=\frac{8-\sqrt{210}}{-2}
Divide both sides by -2.
k=\frac{8-\sqrt{210}}{-2}
Dividing by -2 undoes the multiplication by -2.
k=\frac{\sqrt{210}}{2}-4
Divide -\sqrt{210}+8 by -2.
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