exam Maths Puzzle Numerical Ability

How do I graph this?
y ≤ -x+18
x ≥ 4
y ≥ 3

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exam Other Question

y>3x A dress was first marked down 20% off original price. Then marked down 25
% more off the first sale price and finally 30% off the second sale price. It was sold for 63$ What was the original price? There is no textbook the teacher made it up.