Current location - Recipe Complete Network - Catering franchise - In order to better control the water quality of Chaohu Lake and protect the environment, the municipal pollution control company decided to purchase 10 sets of sewage treatment equipment.
In order to better control the water quality of Chaohu Lake and protect the environment, the municipal pollution control company decided to purchase 10 sets of sewage treatment equipment.
Set up and purchase type a, type x and type b, type y.
X+Y= 10
12X+ 10Y & lt； = 105
The range of values of x and y can be obtained immediately.
240 x+200y & gt； =2040, which can be substituted into the first question.