exam Maths Puzzle Numerical Ability

I am having some problems factoring/fraction the following homework questions, I just don't understand how to find the answer.

x^2 + 8x + 12 / x^2 + 13x + 42

( x + 3 / x

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exam Other Question

How do i get from ~A(Universal)x Cube(x) to ~A(Universal)x (Cube(x) & Small(x)) The sum of two consecutive even integers is 2 more than twice the smaller integer. I tried to set it up as follows: x = first integer, x+2 = second
x+x+2=2x=+2 but then it solves to 0=0