exam Maths Puzzle Numerical Ability

I need to find the real solutions of this:
x^3-5x^2+8x-4

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exam Other Question

how do you find the slope of a line parallel to the graph of the equation of
3x+4y=12 Solve each equation by the addition method. Determine whether the equation are independent, dependant, or inconsistent.
-3x + 2y = 8
3x + 2y = 8

please help me with this equation.
Thank you in advance