It is known that y1=x+3, y2=2-x, when x=what, y1 is 5 greater than y2.
已知y1=x+3，y2=2-x，当x=多少时，y1比y2大5．
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

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

<result>2</result>