exam Maths Puzzle Numerical Ability

Add and Simplify:
1/x-2 - 4/x^2-4 + 3/x+2

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exam Other Question

Could you please take the time to help me solve this problem: Is the logarithm of the sum equals to the sum of logarithms? Give an example to support your point. Is the difference Solve the system by substitution. Help me please.

x + y = 12
y = 2x