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The formula for the volume of a box is V = lwh. Solve the formula for the variable w.

An important formula in chemistry is PV = nRT. Solve the formula for the variable R.

The formula for volume of a cone is V = πr^2h/3. Solve the formula for the variable r.

The formula for circumference is C = 2πr. Solve the formula for the variable r.

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