exam Maths Puzzle Numerical Ability

Please show me the steps to solve this.

graph the region decribed by the inequality

-4>=2y

Thanks so much

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exam Other Question

I am stuck on correct answer for:

If x is directly proportional to y and x = 3 when y = 8, what is the value of x when y = 2

I am not using a specific book. I am just practicing... Find x:y:z, if 2x+y-5z = 0 and 3x-2y-4z=0
a)1:2:1 b)1:1:1 c)1:1:2 d)2:1:1