A resistor triangle

In the above circuit, all the resistors marked \(R\) have a resistance equal to \(5 \Omega\). All of the batteries have electromotive forces of \(4.5 \text{V}\) and an internal resistance of \(3 \Omega\).

Calculate the intensities of the currents \(I_R\) and \(I_B\) through the resistors marked \(R\) and through the batteries, respectively. Input the answer as the sum of the intensities of these two currents in Amperes. If the polarities of the currents are negative, reverse them.

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