There are 1800 students in the school, of which 950 are girls and how many are boys? (solve with an equation involving x)
学校有1800名学生，其中女生有950名，男生有多少名？(用含有x的等式解答)
<gadget id="calculator">1_800 - 950</gadget>
<output>850</output>

<result>850</result>