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kℏ-4=2k
Variable k cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by k.
kℏ-4-2k=0
Subtract 2k from both sides.
kℏ-2k=4
Add 4 to both sides. Anything plus zero gives itself.
\left(ℏ-2\right)k=4
Combine all terms containing k.
\frac{\left(ℏ-2\right)k}{ℏ-2}=\frac{4}{ℏ-2}
Divide both sides by ℏ-2.
k=\frac{4}{ℏ-2}
Dividing by ℏ-2 undoes the multiplication by ℏ-2.
k=\frac{4}{ℏ-2}\text{, }k\neq 0
Variable k cannot be equal to 0.
kℏ-4=2k
Multiply both sides of the equation by k.
kℏ=2k+4
Add 4 to both sides.
\frac{kℏ}{k}=\frac{2k+4}{k}
Divide both sides by k.
ℏ=\frac{2k+4}{k}
Dividing by k undoes the multiplication by k.
ℏ=2+\frac{4}{k}
Divide 4+2k by k.