book Maths Puzzle Numerical Ability

define relation?

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please help me solve this equatition

-2m=-16m-9
simplify the following:
(x+y/x^3-x^2)/(x^2+y^2/x^2-x)
answer:
a. 1/x+y
b. -x
c. x(x^2+y^2)/x+y
d. x+y/x(x^2+y^2)
e. none of the above