book Maths Puzzle Numerical Ability

multiply:

5x+5/x-2*2x^2-8x+8/x^2-1

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book Other Question

problem 84 need help... done wrong :(
I thought it was x < 5 but I was wrong..


2 times a numbed, increaded by 28, is less than or equal to 6 times that number.

x is negative
I need help please with the following equations:

-8 is less than/equal to 4d - 26

15 + 2(5z - 50) <68

5 - 40X <125

9n - 54 > -36

Thank you so much!!