x=1 is the solution of the equation 2+m=4+2x, what is the value of m.
x=1是方程2+m=4+2x的解，m的值是多少．
<gadget id="calculator">4 + 2</gadget>
<output>6</output>

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

<result>4</result>