book Maths Puzzle Numerical Ability

Find all points having an x -coordinate of 2 whose distance from the point (-2,-1) is 5? I think it uses distance formula or a midpoint formula.

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can you please help me with this {4a+2u+i=2
5a+3u+2i=17
a-5u =3
A four-year financial project is forecast to have net cash inflows of $20,000; $25,000; $30,000; and $50,000 in the next four years. It will cost $75,000 to implement the project.