Given that Y1 = 2x + 1, y2 = 5x-8, when what is the value of X, are Y1 and Y2 opposite to each other?

Because Y1 and Y2 are opposite numbers, Y1 + y2 = 0
2X + 1 + 5x-8 = 0, the solution is x = 1
So the answer is that when x = 1, Y1 and Y2 are opposite numbers

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