The number 1987 can be written as a three digit number xyz in some base
b. If x + y + z = 1 + 9 + 8 + 7=25, determine all possible values of x, y, z, b.

Assuming positive integer base and no leading zeroes there is only one valid answer: (x,y,z,b)=(5,9,B,19), B representing the value of 11 in the 19-based system.

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