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V_1 = Voltage drop on first resistor (V)

V_2 = Voltage drop on second resistor (V)

V_3 = Voltage drop on third resistor (V)

V_Bat ≈ 6 Volts

R_1, R_2, R_3 = Resistors (ohm)

V_1 = \frac{V_Bat}{R_1+R_2+R_3}*R_1

V_2 = \frac{V_Bat}{R_1+R_2+R_3}*R_2

V_3 = \frac{V_Bat}{R_1+R_2+R_3}*R_3

V_1+V_2+V_3 = V_Bat