book Maths Puzzle Numerical Ability

solve the linear system...if the system is inconsistent or dependent, so state

3x-2y = 0
9x-8y= 7

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book Other Question

Let p be prime. Prove that...

(1 + p)^(p^(n - 1)) = 1(mod p^n) for all n = 1, 2, 3,...

Would using the Binomial Thm help? What about applying the Chinese Remainder Thm? seven added to 4 times a number is 30