The efficiencies of Party A and Party B are 1/40 and 1/Y respectively.

Can be listed according to the meaning of the question: 30/Y

+( 1/Y+ 1/40)* 20 = 1

Solution: Y= 100

2.

X/40+Y/ 100= 1

Variable: Y/ 100= 1-X/40.

Solution: Y= 100+5X/2.

Because Y & lt70

So15 >; X & gt 12，X= 13、 14

When X= 13, y is not an integer. Therefore, X= 14 and Y=65.

The second question is the same as that of the first respondent.