book Maths Puzzle Numerical Ability

what is the anwser to this equation ?

3x-2=-5

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book Other Question

How do I find the partial fraction decomposition of 2 x2 + 7x + 2/ (x+1)3 and

x2 -5x -19/ (2x -1) (x2 + 4) and 8x3 + 19x/ x4 + 4x2 +4 in how many sets does an angle seperate a plane?