Parallel vs. Series Resistors: Solving for Unknown Voltage and Current

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Parallel vs. Series...HELP!

Homework Statement

When two resistors are connected in parallel across a battery of unknown voltage, one resistor carries a current of 4.3 A while the second carries a current of 3 A. What current will be supplied bu the same battery if these two resistors are connected to it in series?

Homework Equations

The Attempt at a Solution

I need help getting started...

 

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In series the amps are the same throughout every resistor. In parallel the amps all add up to a total amperage. I'm pretty sure I know how to do it..see if you can figure out the rest.