In the second half semester of sixth grade mathematics, "Open Training" 6.8 binary linear equation P54, the fourth major problem, 16, 17, is a minor problem! Solve! Give 25 points for one question! The second question is 50 points. 16, assuming that an X segment is cut into 3cm and a Y segment is cut into 4cm.

3x+4y=47

X and y are integer solutions: when x= 1, y= 1 1.

When x=3 and y=8.

When x=9 and y=5.

When x= 13, y=2.

Therefore, there are four methods.

17, the method is the same as 16.

2 yuan banknotes and 5 yuan banknotes ***26-8= 18 (yuan)

According to the meaning of the question: 2x+5y= 18.

X and y are integer solutions: so there is and only if x=4 and y=2.

So the answer is: x=4 y=2.