Solve the equation: x-3=50-x+3.
解方程：x-3=50-x+3．
<gadget id="calculator">3 + 50 + 3</gadget>
<output>56</output>

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

<gadget id="calculator">56 / 2</gadget>
<output>28</output>

<result>28</result>