3) A company makes two electronic circuit boards that require the same resistance. The Pro-X board runs on 120 volts, while the Pro-I board runs on 90 volts. If the current running through the Pro-I board is 15 fewer milliamps (mA) than the current running through the Pro-X board, how much current is running through each board? Which of the following rational equations bests models this situation? 120 90 15 120 90 T – 15 120 90 I + 15 120 90 ot 15 120 90 15

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