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    I_1 = I_2 + I_3 = I_5 + I_6 = 8

    pd(these don't have one solution)
    2I_2 + 32I_4 = 14I_3
    2I_2 + 11I_5 = 14I_3 + 3 I_6
    11I_5 = 32I_4 +3I_6
 
 
 
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