what is nb = p + nb?
nb = p + nb
2(nb)=p
\(nb=p+nb\)
\(0nb=p+nb-nb\)
\(0=p+nb-nb\)
\(0=p+0nb\)
\(0=p+0\)
\(0=p\)
\(p=0\)
+1904 
