exam Maths Puzzle Numerical Ability

Can you show me how to solve this problem please?
8(2x-9)-3=8(x-8)+(5)

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exam Other Question

Find the equation for the asymtopes of the hyperbola x^2/9 - y^2/81 = 1 Multiply the fraction:

2x^2-x-3 3x^2-11x-20
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3x^2+7x+4 4x^2-9

I am completely lost on this one....to many numbers or letters I am not sure. Thank you for the wonderful help :-)