The three vehicles transport a total of 910 tons of goods. The first vehicle transports 30 tons more than the second vehicle, and the third vehicle transports 20 tons less than the second vehicle. How many tons of goods does the first vehicle transport?
三辆汽车共运输货物910吨，第一辆汽车比第二辆汽车多运30吨，第三辆汽车比第二辆汽车少运20吨，第一辆汽车运货物多少吨．
<gadget id="calculator">30 + 30 + 50 + 910</gadget>
<output>1_020</output>

<gadget id="calculator">1 + 1 + 1</gadget>
<output>3</output>

<gadget id="calculator">1_020 / 3</gadget>
<output>340</output>

<result>340</result>