A washing powder has two specifications: the net weight of the large bag is 1.8 kg, which is 1.5 times the net weight of the small bag; the unit price of the small bag is 7.3 yuan, which is 3.2 yuan cheaper than the big bag. Ask yourself two questions and solve them with equations.
一种洗衣粉有两种规格：大袋净重1.8千克，是小袋净重的1.5倍；小袋的单价是7.3元，比大袋便宜3.2元．自己提两个问题，并列方程解答．
<gadget id="calculator">7.3 + 3.2</gadget>
<output>10.5</output>

<result>10.5</result>