book Maths Puzzle Numerical Ability

If M (5,2) is the midpoint of segment PQ and the coordinates of Q are (3,-3), find the coordinates of P.

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Thanks Earlsdon. It really helped me out alot. I now need help with this problem. Thanks.
What are the next two terms of the sequence 32, -48, 72, -108, . . . ? Use Eular's formula to find the number of edges in the polyhedrn made up of 5 faces: 2triangles and 3 rectangles.