exam Maths Puzzle Numerical Ability

Reduce the fractions to lowest terms.
x^3+x^2+x+1/x^2-1

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exam Other Question

I need help with this...Please:)

I have to find the solution to the system of equations by the substitution method. Check your answers. Place your solution in the form (x,y), (a,b), (p,q), or (s,t).
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Number 2

x=4-4y
-x+2y=2 -10x > -20