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Simplifying (2x + -9) = 90 Reorder the terms: (-9 + 2x) = 90 Remove parenthesis around (-9 + 2x) -9 + 2x = 90 Solving -9 + 2x = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + 2x = 90 + 9 Combine like terms: -9 + 9 = 0 0 + 2x = 90 + 9 2x = 90 + 9 Combine like terms: 90 + 9 = 99 2x = 99 Divide each side by '2'. x = 49.5 Simplifying x = 49.5
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