Solve the equation: 2x+156-6x=120.
解方程：2x+156-6x=120．
<gadget id="calculator">156 - 120</gadget>
<output>36</output>

<gadget id="calculator">6 - 2</gadget>
<output>4</output>

<gadget id="calculator">36 / 4</gadget>
<output>9</output>

<result>9</result>