Write x is double than y

What is the value of x in the diagram below?

Which values of p and q result in an equation with exactly one solution? px-43=-42x+q choose all answers that apply: a) p=-43 and q=-43 b) p=42 and q=43 c) p=43 and q=−42 d) p=42 and q=42

Solve the equation by completing the square. x^2+2x=17