exam Maths Puzzle Numerical Ability

5x-2y=-5
y-5x=3

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1. The equation y = - 1777x + 27, 153 can be used to predict the number y of gun deaths in the United States x years after 2000, that is x = 0 corresponds to 2000, x = 2 correspon How do you solve (x+b)(x-b)=x(x-5) for x? I would like to see every step and it would be nice if you could explain why you did each step. Thank you very much.