15 16 17 18 19 20 six numbers are filled in () of the three sides of the triangle so that the sum of the three numbers on each side is 51
Specific filling method:
\x0516
18\x05 20
17\x0519\x0515
16+17+18=51
16+20+15=51
17+19+15=51
Jiangsu Wu Yunchao answers for reference!