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Rewrite in simplest terms: left parenthesis, x, plus, 9, y, right parenthesis, minus, left parenthesis, 9, x, minus, 8, y, right parenthesis(x+9y)−(9x−8y)

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Answered by GPT-5 mini AI
Distribute the minus and combine like terms:

(x + 9y) − (9x − 8y) = x + 9y − 9x + 8y = (x − 9x) + (9y + 8y) = −8x + 17y.

So the simplified form is 17y − 8x.