The ratio of the amount of money on A and B is 4:3. After A gives B 10 yuan, the money of person B accounts for 1/2 of the total money of the two people. How much money does person B have now?
甲、乙两人身上的钱数的比量4：3，甲给乙10元后，这时乙人的钱占两人总钱的(1/2)，现在乙人有多少钱．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(1/2) - (3/7)</gadget>
<output>1/14 = around 0.071429</output>

<gadget id="calculator">10 / (1/14)</gadget>
<output>140</output>

<gadget id="calculator">140 * (1/2)</gadget>
<output>70</output>

<result>70</result>