Solve for γ
\gamma =\frac{ϕ}{2}
Solve for ϕ
ϕ=2\gamma
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2\gamma =ϕ
Swap sides so that all variable terms are on the left hand side.
\frac{2\gamma }{2}=\frac{ϕ}{2}
Divide both sides by 2.
\gamma =\frac{ϕ}{2}
Dividing by 2 undoes the multiplication by 2.
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