Solve the equation: x-2.5=(x-1.8)*2.
解方程：x-2.5=(x-1.8)*2．
<gadget id="calculator">1.8 * 2</gadget>
<output>3.6</output>

<gadget id="calculator">3.6 - 2.5</gadget>
<output>1.1</output>

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

<gadget id="calculator">1.1 / 1</gadget>
<output>1.1</output>

<result>1.1</result>