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Simplifying (x + -2) + (x + 6) = 9 Reorder the terms: (-2 + x) + (x + 6) = 9 Remove parenthesis around (-2 + x) -2 + x + (x + 6) = 9 Reorder the terms: -2 + x + (6 + x) = 9 Remove parenthesis around (6 + x) -2 + x + 6 + x = 9 Reorder the terms: -2 + 6 + x + x = 9 Combine like terms: -2 + 6 = 4 4 + x + x = 9 Combine like terms: x + x = 2x 4 + 2x = 9 Solving 4 + 2x = 9 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + 2x = 9 + -4 Combine like terms: 4 + -4 = 0 0 + 2x = 9 + -4 2x = 9 + -4 Combine like terms: 9 + -4 = 5 2x = 5 Divide each side by '2'. x = 2.5 Simplifying x = 2.5
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