(1/3) of the number of people in class A plus (1/3) of the number of people in class B is a total of 29 people. It is known that there are 42 people in class A and how many people are there in class B.
甲班人数的(1/3)加上乙班人数的(1/3)一共是29人，已知甲班有42人，乙班有多少人．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">42 * (1/3)</gadget>
<output>14</output>

<gadget id="calculator">29 - 14</gadget>
<output>15</output>

<gadget id="calculator">15 / (1/3)</gadget>
<output>45</output>

<result>45</result>