The sum of the three numbers A, B, and C is 2004, where A is three times the number C, and twice the number B is equal to five times the sum of A and C plus 4. What is the number B?
甲、乙、丙三个数的和是2004，其中甲数是丙数的3倍，乙数的2倍等于甲、丙两数和的5倍加4，乙数是多少．
<gadget id="calculator">2_004 * 2</gadget>
<output>4_008</output>

<gadget id="calculator">4_008 - 4</gadget>
<output>4_004</output>

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<gadget id="calculator">6 + 2 + 5 + 15</gadget>
<output>28</output>

<gadget id="calculator">4_004 / 28</gadget>
<output>143</output>

<gadget id="calculator">3 * 143</gadget>
<output>429</output>

<gadget id="calculator">2_004 - 429 - 143</gadget>
<output>1_432</output>

<result>1_432</result>