6 times x plus the product of 2.5 and 4, the sum is 25, how to find x?
x的6倍加上2.5与4的积，和是25，求x？
<gadget id="calculator">2.5 * 4</gadget>
<output>10</output>

<gadget id="calculator">25 - 10</gadget>
<output>15</output>

<gadget id="calculator">15 / 6</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>