book Maths Puzzle Numerical Ability

I have two questions I am stuck on these problems and how to graph them.
y>3 and the other problem is 4x+y is greater than or equal to 4.
I appreciate the help
thank you very m

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book Other Question

800-50X=Y 3x to the 2 power plus 7 subtract 8 plus 4x to the power 2