exam Maths Puzzle Numerical Ability

Please help to add :

5/x + 6/x^2 - 4 - 3x / 2 - x

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exam Other Question

I need help with this expression.
logA/logB = A/B = 2/3. 2/3 is the correct answer, but the student who did this problem canceled the logs. What are A and B? For the following systems of linear equations:
a) Determine how many solutions exist
b) Use either elimination or substitution to find the solutions (if any)
c) Graph the two l