exam Maths Puzzle Numerical Ability

Find all positive values for K

x2 + x - k

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exam Other Question

5x-(2x+2)=x+(3x-5)
Could you help me to solve this problem?

Thank you I would like a full description on how to solve the equation below and the answer:

n
- ≥ 1
4

*Note*:n - 4 is N on 4,a fraction.

Thank you for your time!