How Do You Calculate Current in Series-Parallel Circuits?

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To calculate current in series-parallel circuits, first identify the configuration of the resistors, noting that R2 and R3 are in parallel while R1 is in series with this combination. Begin by calculating the equivalent resistance of R2 and R3 in parallel. The total circuit current can then be determined, which is the same through R1. To find the individual currents through R2 and R3, apply the current divider rule. Understanding these steps is crucial for accurately analyzing series-parallel circuits.
Gerard
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Could someone please show me how I would go about finding the current over each of these resistors.

http://img263.imageshack.us/img263/7983/physicszb8.jpg

I never seem to series-parallel circuits right.=(

thanks in advance.
 
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R2 and R3 are in parallel and this parallel combination is in series with R1. First find equivalent of R2 and R3 in parallel.
 
Well looking at the circuit. R1 is in series with the rest of the circuit. This means the the current through R1 is the same as...?

Find the total circuit current. From the schematic, it should be obvious that the parallel combination of R2 and R3 receive the total circuit current. So to find individual currents in the parallel branches, use the current divider rule.
 

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