Guangming Primary School bought 3 tables and 4 chairs and paid 490 yuan in total. The price of each table is twice that of each chair. How much does each table cost? (solution by equation)
光明小学买了3张桌子、4把椅子，共付490元，每张桌子的价格是每把椅子的2倍，求每张桌子要多少元？(用方程解)
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">6 + 4</gadget>
<output>10</output>

<gadget id="calculator">490 / 10</gadget>
<output>49</output>

<gadget id="calculator">49 * 2</gadget>
<output>98</output>

<result>98</result>