How to solve circuits

how to solve circuits

1. Series circuit
2. You have to search V1, V2, V3, It and Rt 
3. To know the V1, V2 and V3 you have to apply the Ohm's law: V1=R1I1 
4. To know the It, you have to do the Ohm's law: I=V/R
5. To know the Rt, you have to do Ohm's law: R=V/I

1. Parallel circuit
2. You have to search Rt, I, I2, I3 and It
3. To know the Rt you have to do