In May, Xiaoming's father's mobile phone bill was 150 yuan, which was 10 yuan more than twice the mother's mobile phone bill. How much is my mother's mobile phone bill in May?
五月份小明爸爸的手机费是150元，比妈妈手机费的2倍还多10元．五月份妈妈的手机费是多少元？
<gadget id="calculator">150 - 10</gadget>
<output>140</output>

<gadget id="calculator">140 / 2</gadget>
<output>70</output>

<result>70</result>