I was just watching some videos and came across beta+ radiation (when a positron is emitted). It then occurred to me, how can the following be true, given that a positron and an electron have the same mass:
neutron = proton + electron [eq 1, beta- decay]
proton = neutron + positron [eq 2, beta+ decay]
As this would mean, a neutron = neutron + positron + electron (substitution of eq 2 in eq 1), which seems impossible?