exam Maths Puzzle Numerical Ability

14x^3y^3/15x^6y

/98x^2y/21x^2y^3

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exam Other Question

OK I am stuck on how to do this. Can you please explain it.The problem goes like this: Solve and graph the solution set.
a) 5y+3,_< -2 or y-7_>0
b) x-9< 3x-4< x+8
PLEASE HELP Solve and check each of the following equations for x.

x/6 - x/8 = 1

Thank You!!!