Solve the equation: 24+x=30-x.
解方程：24+x=30-x．
<gadget id="calculator">30 - 24</gadget>
<output>6</output>

<gadget id="calculator">1 + 1</gadget>
<output>2</output>

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

<result>3</result>