book Maths Puzzle Numerical Ability

I am trying to find the anser to these equaisions...Please help
A(-2,8), B(10,-1)
X(-7,-1), F(-6,-1)

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book Other Question

find 3 consecutive odd intergers so that 30 more than the first number is 31 less than twice the middle number Either perform the indicated operation or solve the equation, whichever is appropriate.

-5/-a^2-4 - 2/a^2-3a+2