exam Maths Puzzle Numerical Ability

Solve for x. -8(4x + 0) + 4(8x-2) = x - 9

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exam Other Question

The problem is 2/x^-4. I know the way to solve normal negative exponents so I tried that and got: 2/1/x^4, simplified to 2/x^4 because 2/1 is 2. I got 2/x^4 as a final answer. Is this correct? 36 times one-sixth squared plus 36 times one-sizth minus 9 squared