Problem C. 1290. (April 2015)
C. 1290. Solve the equation \(\displaystyle 2xy+2x5y=40\) on the set of pairs of integers \(\displaystyle (x;y)\).
(5 pont)
Deadline expired on May 11, 2015.
Statistics:
136 students sent a solution.  
5 points:  92 students. 
4 points:  27 students. 
3 points:  6 students. 
2 points:  4 students. 
1 point:  5 students. 
0 point:  2 students. 
