Exam Maths Puzzle Algebra

We have a rectangle where 2x + 2y = 45, and x = 2/3y, solve for x (or Y). How do you solve this?

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Exam Other Question

Is it possible for a quadratic function to have one real zero and one imaginary zero? Why? Coul you give me an example? how would you answer5(c-b)+10

a=5 b=3 c=9