The weight ratio of two bags of sugar, A and B, is 4:1. Take 10 kg of sugar from bag A and put it into bag B. At this time, the weight ratio of the two bags of sugar is 7:5. Find the sum of the weights of the two bags of sugar.
甲、乙两袋糖的重量比是4：1，从甲袋中取出10千克糖放入乙袋，这时两袋糖的重量比为7：5，求两袋糖的重量之和．
<gadget id="calculator">7 + 5</gadget>
<output>12</output>

<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

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

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(5/12) - (1/5)</gadget>
<output>13/60 = around 0.216667</output>

<gadget id="calculator">10 / (13/60)</gadget>
<output>600/13 = around 46.153846</output>

<result>600/13 = around 46.153846</result>