There is a batch of coal in the cafeteria, x tons are burned, and 5 tons are transported in, leaving 100 tons. How many tons did this batch of coal originally have?
食堂有一批煤，烧了x吨，又运进5吨，还剩100吨．这批煤原来有多少吨．
<gadget id="calculator">100 - 5</gadget>
<output>95</output>

<result>95</result>