book Maths Puzzle Numerical Ability

4/x^2 + 3/x -10 = 0

6 + 4/x-1 = 5/x-3

3.5x + 4.6/x = 1.2

Can anyone help me?!

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book Other Question

solve x^2-16x+32=0 by completing the square 3x+4=10