book Maths Puzzle Numerical Ability

Hi
I'm really stuck on this problem. Someone please help me solve it because i have this assignment due soon. Thanks
Write the fraction as a sum of terms.
{x^2-4x+2/x}. I don't

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book Other Question
Could you help me solve this problem?

1 1/15 + 3 3/10 - 2 4/5

Thanks! solve each system by the substitution method.
3(y-1)=2(x-3)
3y-2x=-3
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write a system of two equations in two unknowns for each problem.