2015=101b+19a solve for (a+b)

2015=101b+19a solve for (a+b)
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This equation can be written 19a+19b+82b=2015, from which 19(a+b)=2015-82b. (a+b)=(2015-82b)/19. By breaking this down into multiples of 19 we get (a+b)=106-4b-(6b-1)/19.
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