Solve the equation 2x-3.5=5.3, x=how much.
解方程2x-3.5=5.3，x=多少．
<gadget id="calculator">5.3 + 3.5</gadget>
<output>8.8</output>

<gadget id="calculator">8.8 / 2</gadget>
<output>4.4</output>

<result>4.4</result>