RT R2 R3 A V In the diagram above : R1 = 1 0 R2 = 3 0 R3 = 2 0 and the voltage supplied by the power supply is V = 15 V What single resistor could

I want to know the answers and how to calculate it! Thank you so much!

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RTR2R3AVIn the diagram above :R1 = 1 0R2 = 3 0R3 = 2 0and the voltage supplied by the power supply is V = 15 VWhat single resistor could replace R. I and R2, resulting in the circuit having the same total resistance ?!V Q