Calculating things inside a circuit with resistors (parrallel and series) - Electrical Engineering Stack Exchange
Resistor Values: How to Calculate and Understand It
How to calculate the resistance of a combination circuit which has four resistors with two known values (R4=2, R3 =4) and a voltage of 12? (R1 and R4 part of series, R2,
How to Calculate Voltage Across a Resistor (with Pictures)