exam Maths Puzzle Numerical Ability

Please help me solve the equation. -4(x-9)=-8.

Thanks for all of your help!

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exam Other Question

What is -52 graphed? If k, n, x, and y are positive numbers satisfying x^-4/3 = k^-2 and y^4/3 = n^2, what is (xy)^-2/3 in terms of n and k?