Rearranging formulas

Rearranging a formula means solving it for a different letter than the one it's usually written for, like rearranging Ohm's law V = IR to highlight resistance, R = V/I: if a circuit has V = 12 volts and I = 4 amps, then R = 12/4 = 3 ohms, using the exact same equation-solving steps as any other equation.

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