Solution: If you borrow X yuan from Party A, you will borrow (136-x) yuan from Party B.

12% x+ 13%( 136-x)= 16.84

0. 12x+ 17.68-0. 13x = 16.84

17.68-0.0 1x = 16.84

0.0 1x=0.84

x=84

B: 136-84=52 (ten thousand yuan)