Solve the equation: 2.1x+4.8=4.6x+1.6.
解方程：2.1x+4.8=4.6x+1.6．
<gadget id="calculator">4.8 - 1.6</gadget>
<output>3.2</output>

<gadget id="calculator">4.6 - 2.1</gadget>
<output>2.5</output>

<gadget id="calculator">3.2 / 2.5</gadget>
<output>1.28</output>

<result>1.28</result>