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Simplifying 7x + 81 = -2x Reorder the terms: 81 + 7x = -2x Solving 81 + 7x = -2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2x' to each side of the equation. 81 + 7x + 2x = -2x + 2x Combine like terms: 7x + 2x = 9x 81 + 9x = -2x + 2x Combine like terms: -2x + 2x = 0 81 + 9x = 0 Add '-81' to each side of the equation. 81 + -81 + 9x = 0 + -81 Combine like terms: 81 + -81 = 0 0 + 9x = 0 + -81 9x = 0 + -81 Combine like terms: 0 + -81 = -81 9x = -81 Divide each side by '9'. x = -9 Simplifying x = -9
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