exam Maths Puzzle Numerical Ability

Please solve the simltaneous equations 8logx base 9 - 9logy base 27=8 and logx base 3 + 8logy base 8=13

im really stuck on this question!!

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exam Other Question
One root of the function y=x^2-10x+k is 5+2isqrt3. What is the value of k???? Write a solutionset for y=3abs(7-2x)+5 when y<8.