exam Maths Puzzle Numerical Ability

Divide
x^2 – 9x + 20/ 3x – 15 ÷ x^2 – 16/9x + 36

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exam Other Question

help with this problem please...
0.4z-0.15=0.65-0.3(6-2z)
Find the solutions of the following equations. Check for extraneous solutions.
(x-5)^1/4+3=2