exam Maths Puzzle Numerical Ability

How do I find all the values of w satisfying the equation?
6-5/w+2=-4/w-1

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exam Other Question

5) solve 4x+x(x-1)=0
find the x-intercepts of f(x)=4x+x(x-1)
What are the solutions x=……….
What are the x-intercepts
Please find derivative and simplify:

y=ln(3x-5)^3/(5x+4)^4