Răspuns :
427-(G-21)=100 291-f+1006=500 1700-(h+69)=500
g-21=100+427 291-f=1006-500 1700-h=500-69
G-21=527 291-f=506 1700-h=431
G=527+21 f=506+291 h=1700+431
G=548 f=797 h=2131
g-21=100+427 291-f=1006-500 1700-h=500-69
G-21=527 291-f=506 1700-h=431
G=527+21 f=506+291 h=1700+431
G=548 f=797 h=2131