Calculate voltage, current and resistance in a complex mixed circuit
I'd redraw it like this to make it easier to visualize: -







simulate this circuit &ndash; Schematic created using CircuitLab

And if you are really lucky and all the resistors are the same value then R3 will pass no current and can be omitted. If not, convert R1 and R4 into a voltage source of 5\$\frac{R4}{R1 + R4}\$ with an output resistance of R1||R4. Do the same for R2 and R5 then you just have a series circuit with no complexity.