Răspuns :
n:p=5 => n=5p =>5p + p =978 => 6p= 978 => p=978:6 => p=163 => 3p=163 ori 3 => 3p=486
n+p=978
n:p=5
3*n=?????
n=5p
n+p=978
5p+p=978
6p=978
p=978:6
p=163
n=163*5
n=815
n*3=?
815*3=2445(triplul)
n:p=5
3*n=?????
n=5p
n+p=978
5p+p=978
6p=978
p=978:6
p=163
n=163*5
n=815
n*3=?
815*3=2445(triplul)