Solve the equation: 0.5(x+2)=3.
解方程：0.5(x+2)=3．
<gadget id="calculator">0.5 * 2</gadget>
<output>1</output>

<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">2 / 0.5</gadget>
<output>4</output>

<result>4</result>