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Simplifying [2x + -6] = 81 Reorder the terms: [-6 + 2x] = 81 Remove brackets around [-6 + 2x] -6 + 2x = 81 Solving -6 + 2x = 81 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + 2x = 81 + 6 Combine like terms: -6 + 6 = 0 0 + 2x = 81 + 6 2x = 81 + 6 Combine like terms: 81 + 6 = 87 2x = 87 Divide each side by '2'. x = 43.5 Simplifying x = 43.5
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