exam Maths Puzzle Numerical Ability

Hi, I need assistance in solving the following inequalities:

1) -(3/4)x >= 6


2) |x| < 3


3) 4(5 - x) < 20


4) 2x + 3 > 1

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exam Other Question
A dairy has 50 Gallons of milk that is 7.8 % butterfat. how much skim milk (no butterfat) should be mixed with it to make milk that is 2% butterfat? determine the equation whose roots are -2,3,and 4