book Maths Puzzle Numerical Ability

1/x-4 - 3/x square-16 + 2/2x+8

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i cant figuer out this problem it is to difficalt and its do at 12:00pm today and i really need your help please cant you give some information about this please please my name is Please help me solve this equation and show me how it was done so that I will be able to finish the rest of my homework.
-10b - 7 = 9