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Simplifying (2x + -7) * 2 = 81 Reorder the terms: (-7 + 2x) * 2 = 81 Reorder the terms for easier multiplication: 2(-7 + 2x) = 81 (-7 * 2 + 2x * 2) = 81 (-14 + 4x) = 81 Solving -14 + 4x = 81 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '14' to each side of the equation. -14 + 14 + 4x = 81 + 14 Combine like terms: -14 + 14 = 0 0 + 4x = 81 + 14 4x = 81 + 14 Combine like terms: 81 + 14 = 95 4x = 95 Divide each side by '4'. x = 23.75 Simplifying x = 23.75
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