Răspuns :
a+b=380 a>b=a-b=3xb=a=3xb+b=a=4xb
inlocuire:4b+b=380=5xb=380
b=380:5=76
a=4x76=304
inlocuire:4b+b=380=5xb=380
b=380:5=76
a=4x76=304
a I-----I-----I-----I-----I }380
b I-----I
4+1=5(parti egale)
380:5=76(b)
76x4=304(a)
b I-----I
4+1=5(parti egale)
380:5=76(b)
76x4=304(a)