Solving Equation 2: (x-15)=5: (2x-20)
解方程2：(x-15)=5：(2x-20)
<gadget id="calculator">5 * 15</gadget>
<output>75</output>

<gadget id="calculator">2 * 20</gadget>
<output>40</output>

<gadget id="calculator">75 - 40</gadget>
<output>35</output>

<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">5 - 4</gadget>
<output>1</output>

<gadget id="calculator">35 / 1</gadget>
<output>35</output>

<result>35</result>