One number is 7 and the other number is 3 greater than its opposite. What is the sum of these two numbers
一个数是7，另一个数比它的相反数大3．则这两个数的和是多少
<gadget id="calculator">(-7) + 3</gadget>
<output>-4</output>

<gadget id="calculator">7 + (-4)</gadget>
<output>3</output>

<result>3</result>