book Maths Puzzle Numerical Ability

i have worked on this problem and can't get it

solve:

a over a+1 + 2a+4 over a^2-3a-4=2 over a-4

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book Other Question

Complete the statement to show how to order fractions using the addition approach.

"a/b < c/d, if ... "
I am taking Developmental Algebra and I need help solving this inequality.

0.4x + 0.4 <= 0.1x + 0.85