exam Maths Puzzle Numerical Ability

Please show me how to slove problems

(5,-2), m=3
(5,4), m=-5
(-3,-1),m= -2/3

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exam Other Question

3/2x-2 + 1/2 = 2/x-1

3 over 2x-2 plus 1/2 equals 2 over x-1

Note restrictions if neccessary. Once again!!!
My # is square
My # is easy
My # is 3 digits
3 is a factor of my #
Help!!!!