45% of a number is 10 less than (1/2) of this number. Find this number. (column equation)
一个数的45%比这个数的(1/2)少10，求这个数．(列方程)
<gadget id="calculator">0.5 - 0.45</gadget>
<output>0.05</output>

<gadget id="calculator">10 / 0.05</gadget>
<output>200</output>

<result>200</result>