The perimeter of an isosceles triangle is 80 cm and its base is 12 cm less than twice the length of the waist. What is the length of the base of this triangle?
一个等腰三角形的周长是80厘米，它的底边比一条腰长的2倍少12厘米．这个三角形的底边长是多少厘米？
<gadget id="calculator">46 - 12</gadget>
<output>34</output>

<result>34</result>