book Maths Puzzle Numerical Ability

ALG.2
hi i am having trouble figuring out this problem...its finding the variable...

Y=u+1/u+2 find the variable for U.


thank you

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book Other Question

please do this for me3/9z+8=12 Another factoring method question. I just can't seem to understand these problems that want me to use the factoring method

(x^2/4) - 1 - 2x = -1

Can someone please help me ou