Solve for b
b=\frac{\sqrt{3}d}{3}
Solve for d
d=\sqrt{3}b
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\sqrt{3}b=d
Swap sides so that all variable terms are on the left hand side.
\frac{\sqrt{3}b}{\sqrt{3}}=\frac{d}{\sqrt{3}}
Divide both sides by \sqrt{3}.
b=\frac{d}{\sqrt{3}}
Dividing by \sqrt{3} undoes the multiplication by \sqrt{3}.
b=\frac{\sqrt{3}d}{3}
Divide d by \sqrt{3}.
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