exam Maths Puzzle Numerical Ability

How would you write the answer to this problem in lowest terms?

y/y^2+y-20-4/y^2+y-20

Help would be much appreciated.

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exam Other Question
In triangle XYZ, XY=YZ. If m angle X=52, find m angle Y??? Use Cramer Rule.

x-3y+z=-2
x+2y=8
2x-y=1