Question: A six digit code is valid if satisfies following congruence: x; + 3x2 + x3 + 3x + xy + 3xq=1(mod 10), where x, are

A six digit code is valid if satisfies following congruence: x; + 3x2 + x3 + 3x + xy + 3xq=1(mod 10), where x, are digits of the code. Find the last digit (x) of the code starting with digits 78132xg. Provide all supportive work. Your answers: Xo =

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