book Maths Puzzle Numerical Ability

How do i solve this in synthetic division (x to the third power plus x to the second power minus threex plus four)divided by (x minus three)

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I need help with the following problem.

Solve for X
6/x^2-1 + 5/x+1 = 3/x-1
I need your help on Proportions and Rational Expressions.
Please show your steps, and explain well.
/ will define a fraction, "divided by" is a division symbol... I hope I wrote