exam Maths Puzzle Numerical Ability

please help

-6x^6(-3x^3)^2
______________

9x^3

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exam Other Question

I am comlpetley lost at how to begin to solve this problem
here is the question
4/3 = 8
-
b

the way it is written in the book is 4/3 divided by b equals 8
x men x days of work in x