I have two resistors which need to be replaced. I tried to determine the value, but it can't make sense of these black bands: 
For reference the bands are:
- brown - silver - green - brown - black
- brown - silver - red - brown - black
Since a silver line can only be part of the multiplier, that means the black line on the right has to be the tolerance. Black can not be used for a tolerance from what I've read.
Is this black line a tolerance value or something else?
Answer
I don't think I've ever seen a resistor value with a leading zero (usually those super-low values are marked with the value in numerals), but that's what those appear to be. 0.012\$\Omega\$ 1% and 0.015\$\Omega\$ 1% are what I see (reading from right to left, as Olin suggests, but I think the silver is a multiplier and the brown is the tolerance).
Here's a 0.015\$\Omega\$ 1% resistor (courtesy Digikey):
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